I am doing a PhD in oil quality and I found this video very interesting. Thank you very much, you are great!
@MicroChemsExperiments3 жыл бұрын
Glad it was helpful!
@user-jk6yb4wz3s2 жыл бұрын
Hello.. Have your Facebook account available?
@shraddhapiligaonkar3639 Жыл бұрын
I want a procedure for preparation of 0.5 N alcoholic KOH
@chemsciences126 Жыл бұрын
kzfaq.info/get/bejne/n6d8jM-pqtOydY0.html
@chemsciences126 Жыл бұрын
Dear Mario Vendrell Your are doing good. It's my channel, hopefully, my videos will also helpfull to you. Thank u
@suhanamughal11032 жыл бұрын
This video was very clear and help full. Thank you for the effort👍🏻
@MicroChemsExperiments2 жыл бұрын
You are welcome
@maryamnisar96973 жыл бұрын
Very nice description!!! I have watched the whole video Also good presentation Keep it up!!!!!
@MicroChemsExperiments3 жыл бұрын
Maryam Nisar, thank you very much. Many upcoming videos are waiting for you. Be with us.
@prathameshmhatre1211 Жыл бұрын
Thanks I have my practical exam and this helped a ton!
@MicroChemsExperiments Жыл бұрын
Great to hear!
@AbhishekSharma-mo3nb2 жыл бұрын
Keep it up Doing great 👍 And thanks for vedios
@MicroChemsExperiments2 жыл бұрын
Thanks
@yogeshmandole59537 ай бұрын
Please keep going, this is really helpful
@abianand95823 жыл бұрын
Super . Your effort is nice and best hard working . Thank you
@MicroChemsExperiments3 жыл бұрын
Thank you
@rajesh79993 жыл бұрын
You can add the use of test for beginners so they can know immediately...thank you...good experiment channel keep going
@MicroChemsExperiments3 жыл бұрын
NUTHAKKI RAJESH, thank you for your comment. Surely we will add uses of the test in the video description. Keep supporting us.
@lorenzycodo6972 жыл бұрын
Hi, how do we calculate the normality of sodium thiosulphate? Thank you for this very informational video.
@MicroChemsExperiments2 жыл бұрын
kzfaq.info/get/bejne/jph7paWX07HbYmg.html
@keshavtat84718 ай бұрын
Yes but confusing me between 0.1 N thiosulphate and 0.01 N thiosulphate Plz tell me how to make 0.01N and standardize.
@vlogsbyzeeshan35269 ай бұрын
You didnt proformed this procedure accroding to AOAC method. you must titrate the oil after adding the potassium iodide to remove yellow color and then add the starch solution then again titrate to remove bluish color
@nasabanicholas84962 ай бұрын
Very helpful
@MicroChemsExperiments2 ай бұрын
Thank you
@ehsanasghar7448 Жыл бұрын
thanks, it is very helpful.
@user-qk1in7lx5e11 ай бұрын
thanks for the great video
@user-xb2cq9kl3j Жыл бұрын
Good video guys keep growing
@MicroChemsExperiments Жыл бұрын
Thanks. Stay with us
@sujisujith476 Жыл бұрын
Hello.. Is there any relation between free fatty acid and peroxide value?? Means if i get Free Fatty Acid high then should i get peroxide value also high?? Plz relpy
@vishmithabsshettigar6700 Жыл бұрын
Was very clear and a nice explanation...Thank you😊 Can you please clarify my doubt regarding how to standardize the prepared solution of sodium thiosulphate with potassium dichromate...Plz🙏
@MicroChemsExperiments Жыл бұрын
Already uploaded in another video. Please find it in this channel
@imandyadharmathilaka739 Жыл бұрын
Thanks for this great video! Can you explain how standardized the preparade 0.01N sodium thiosulpate solution with potassium dicromate. How much we need to add?
@MicroChemsExperiments Жыл бұрын
Follow this video: kzfaq.info/get/bejne/jph7paWX07HbYmg.html
@impostor43773 жыл бұрын
Thank you for sharing this information.
@MicroChemsExperiments3 жыл бұрын
Norman Guanizo, you are welcome
@impostor43773 жыл бұрын
MicroChem's Experiments do you have details on how create citric acid sulotion for physical degumming. Let say i have 1L of coconut oil how much citric acid and water to mix to perform degumming.
@meltunivers64753 жыл бұрын
thank you so much for this video
@MicroChemsExperiments3 жыл бұрын
You are most welcome.
@miguelangelruiz11145 ай бұрын
Great video and helpme a lot, and so ¿This techique work for oils of animal origin? thanks!!
@MicroChemsExperiments5 ай бұрын
Yes
@Farmville913 жыл бұрын
Thank you!
@MicroChemsExperiments3 жыл бұрын
It's our pleasure. Stay with us.
@happyneal16183 ай бұрын
May I know thr effecta of Acetic Acid, Potassium Iodide, Water, and Starch soluble in the solution? Also, is the measurement of the reagents added in the solution should be accurate and in order? Thank you.
@VivekKumar-eu3ty4 ай бұрын
Thanks mam
@tsmtvipergaming68193 жыл бұрын
nice work
@MicroChemsExperiments3 жыл бұрын
Rahul Pawara, Thank you.
@engfatmaabomosa8033 жыл бұрын
Thanks for your efforts, please can you explain that high value? You know that the value of oil peroxide must be on range from 0.6 to 0.7 in final product , l did the experiment but the value was very high!!!
@MicroChemsExperiments3 жыл бұрын
High peroxide valo means low quality oil or very rancid oil. The oil that has been degraded its component.
@engfatmaabomosa8033 жыл бұрын
@@MicroChemsExperiments thank you so much 😍🥰
@rohitrajput82412 жыл бұрын
Dear sir/mam please make the video of dailation test of vanaspati ghee
@MicroChemsExperiments2 жыл бұрын
Will try
@Akbar-jw3oi2 ай бұрын
Can you please do how to check p anisidine value in oil
@thidieuvypham5326 Жыл бұрын
Hi. Thanks for the great video! Could you inform me why we have to use acetic acid-chloroform solution but not other solutions ?
@MicroChemsExperiments Жыл бұрын
AOAC method said so. We will make video later explaining the mechanism of chemical reactions.
@ajforeversmiley26413 жыл бұрын
When I add the 1% starch solution, there is no colour change. What am I doing wrong?
@MicroChemsExperiments3 жыл бұрын
Ajforeversmiley, Possible two reasons for no color change after adding 1% starch are given below: 1. May be the starch solution is not freshly prepared. 2. May be your sample have very low peroxide value.
@islascel26523 жыл бұрын
@@MicroChemsExperiments If the color does not change even though I prepared it fresh, is the starch powder I use spoiled?
@MicroChemsExperiments3 жыл бұрын
@@islascel2652 No, we can not say directly that starch powder is spoiled if color does not changed. when we add starch solution, amylose forms a blue to black solution with iodine. So if your sample does not contain iodine then black color will not be formed. The peroxide value is determined by measuring the amount of iodine which is formed by the reaction of peroxides (formed in fat or oil) with iodide ion. So, if color does not changed, interpret the Peroxide value result as 'Nil'
@motivationpk1233 жыл бұрын
You could try heating the starch solution before adding it. Worked for me
@29moch.syarifbisma.a62 жыл бұрын
@@MicroChemsExperiments Btw When i added Starch first before Distilled water, the black/blue colour is appear Is that true?
@devanshdesai18112 жыл бұрын
Thank you for this video. As per ISO and FSSAI manual, there is a step "Titrate with 0.1 N sodium thiosulphate solution with constant and vigorous shaking. Continue titration until the yellow colour almost disappears. Add 0.5 ml of starch solution and continue titration till the blue colour just disappears." AOAC has also mentioned the same. But most of the industries also don't follow this step. They generally do titration directly after adding starch indicator. You also did not followed this step in video. Can you please give some clarity on this?
@MicroChemsExperiments Жыл бұрын
The type of the titration is two steps titration, so it should be completed separately in two steps to get the more accurate results as suggested by AOAC.
@IrfanAli-xy5bf3 жыл бұрын
Miss kindly share rencidity and FFA testing procedure of shortening. Thanks.
@MicroChemsExperiments3 жыл бұрын
Irfan Ali, you can find FFA from acid value of an oil sample and Acid Value determination procedure is already uploaded. We will upload Rencidity determination procedure very soon. Thank you for being with us.
@souravsarkar44973 жыл бұрын
Thanks for making this video
@souravsarkar44973 жыл бұрын
Can you prepare ' oxidation value of oil' video ?
@MicroChemsExperiments3 жыл бұрын
@@souravsarkar4497 You are welcome. Noted the parameter. We will work on it.
@souravsarkar44973 жыл бұрын
@@MicroChemsExperiments i couldn't get this video
@MicroChemsExperiments3 жыл бұрын
@@souravsarkar4497 Why? Which part of this video is not understandable to you? I think it's a clearly explained video.
@souravsarkar44973 жыл бұрын
@@MicroChemsExperiments i want to know oxidation value of oil and fat
@payrawsalh64853 жыл бұрын
thanks a million
@MicroChemsExperiments3 жыл бұрын
You are most welcome. Stay with us.
@rowidakhalily57603 ай бұрын
Plz tall me what is 26.5 . Because you did just one time titration
@ruchirdave2823 Жыл бұрын
Hello, Thanks for the video it was very informative I want to know whether this method is useful for excipient study?
@MicroChemsExperiments Жыл бұрын
Yes. Useful
@sarahkhan998811 ай бұрын
Wow this video is really helpful for me thanks❤!! Can I know why the unit is in per kg, when we use our oil sample in gram for the calculation though?
@MicroChemsExperiments10 ай бұрын
Look at the calculation again. It was multiplied by 1000 to covert the value into Kg.
@morszepesi415 Жыл бұрын
Thanks for the great video! Could you please give the different chemical reaction equations for each step? Thanks.
@MicroChemsExperiments Жыл бұрын
Great suggestion! Soon
@pranaysarkar16113 жыл бұрын
Lovely
@MicroChemsExperiments3 жыл бұрын
Pranay Sarkar, Thank you so much. Be with us.
@zz-kc9mc8 ай бұрын
Is it inappropriate to stop titration when the solution's top part turns into white?? not the whole part. In our lab, we stop titration when the top part turns into white.. I want to know is there any difference between these two methods.
@RJ109112 жыл бұрын
Thanks a lot for making video on this reaction. For few mineral oil we check we didnt get yellow colour after add of ki.so we consider it as a nil. U hv used conc acetic acid. We use diluted as per our sop borrowed fm renowned customer. Will it make diff huge diff.
@MicroChemsExperiments2 жыл бұрын
You should use concentrated acetic acid as said in AOAC.
@raviparodhi96396 күн бұрын
Video for lecithin analysis
@hafezquadri29723 жыл бұрын
For oils we can use sample directly for analysis.. But could u please tell me how to test a food sample ..any digestion process is required??
@MicroChemsExperiments3 жыл бұрын
To test a food sample, you have to extract fat or oil content from your food sample first, following our video: kzfaq.info/get/bejne/aJqhirl90p3MmKs.html After extraction of Fat or oil, use the extracted fat/oil to test for peroxide value by following this video.
@hafezquadri29723 жыл бұрын
@@MicroChemsExperiments ok thank u..I know about the soxhlet extraction process. Since it is a lenghty process iam looking for any alternative method ...plz do let me know if an other .tq
@MicroChemsExperiments3 жыл бұрын
@@hafezquadri2972 No other method known to me except extraction of fat
@vineetpal4789 Жыл бұрын
You are great😂❤❤❤
@MicroChemsExperiments Жыл бұрын
Thank you
@evancbiju4742 жыл бұрын
Thank u👏Where did that 1000 in the calculation come from?
@MicroChemsExperiments2 жыл бұрын
Calculation factor
@evancbiju4742 жыл бұрын
@@MicroChemsExperiments How can we find that?
@ishaursekar99165 ай бұрын
I am using olive oil, and since chloroform is not available in my school, can I use dichloromethane as a solvent instead of the chloroform-acetic acid mixture?
@MicroChemsExperiments4 ай бұрын
Never find any reference of using dichloromethane. So, no idea
@QuanMinh-et1dm2 жыл бұрын
Can I measure the Peroxide Value while the oil is still hot? Thank you for the great video by the way!
@MicroChemsExperiments2 жыл бұрын
Yes. You can.
@sarahbensoula3378 Жыл бұрын
hello, please can you tell me if i can use this method if i have a really small amount of fat (extracted from a muscle), if not can you recommend me a better method to determine the peroxide value. thank you.
@nonavancoillie900 Жыл бұрын
For acetic acid, can you also use the acetic acid you use in the kitchen?
@MicroChemsExperiments Жыл бұрын
No. The acetic acid in your kitchen is in food grade quality. In analytical laboratory, always use analytical grade of chemicals.
@dianareyes73715 ай бұрын
What if the sample is expected to contain iodine? Would this protocol still be applicable since it is using KI as a reagent? Thank you.
@MicroChemsExperiments5 ай бұрын
Yes. Same protocol should be followed
@nayabghori59348 ай бұрын
can we also calculate tocopherols by this titration method ?
@Farmville913 жыл бұрын
Can you use acetic acid / Isooctane, instead of the chloroform? And this and all your videos are very HELPFUL!! Thank you!
@MicroChemsExperiments3 жыл бұрын
Thank you so much for your comment. No, you can't use any other chemical replacing the chloroform in this test.
@iamjhentayoto96622 жыл бұрын
Yes.. For safety reason, they allow to use isooctane in replace of chloroform
@lingalaschool4428 Жыл бұрын
Thank you for ypour video, i need to check peroxide value in macadamia nuts. Do i have to extract the oil from them or i can grind them into poweder and then add distilled water or (what chemical can be added to extract) and shake. which is the easier way. If i have to extract oil which is the method? Thank you
@MicroChemsExperiments Жыл бұрын
If you extract the oil from your sample and do the analysis then it would generate more accurate test results. You can extract the oil by the method of fat extraction using n-Hexane or petroleum ether
@pukhrajchhipa7732 жыл бұрын
Range of peroxide value in soyabean refined oil ????
@MicroChemsExperiments2 жыл бұрын
Take reference of ranges using Google
@SharifulIslam-kb7jd3 жыл бұрын
Your caption says you are determining Peroxide value but during the calculation you said acid value 4.09 meq/kg
@MicroChemsExperiments3 жыл бұрын
It was a slip of tongue. You did mistake in sayings. It should be peroxide value. We actually determined peroxide value in this video. We are very sorry for our mistake.
@arslanmunir9334 Жыл бұрын
Which type of starch is use as an indicator? It available as rice, potato and other starch. Can you please specifies its type?
@MicroChemsExperiments Жыл бұрын
Use reagent grade starch which is soluble in warm water
@arupsarkar5252 ай бұрын
What standard peroxide value ??
@noorinoora2627 Жыл бұрын
Why when i put starch the sample not turning blue/ black it just white
@MicroChemsExperiments Жыл бұрын
Prepare chemicals freshly and try again
@motivationpk1232 жыл бұрын
Do you need a blank titration too for the analysis? Some people do a separate titration for the blank sample. Then subtract the titre value of the blank from the sample(Vs-Vb). Before putting that value into the calculation
@MicroChemsExperiments2 жыл бұрын
Yes. you can conduct blank titration to get the more accurate result. But without blank titration you can also get a acceptable result.
@motivationpk123 Жыл бұрын
Should the blank give a higher or lower titre value?
@SUARTS1433 жыл бұрын
Super
@MicroChemsExperiments3 жыл бұрын
Thank you
@isurikavindiamarasingha855 Жыл бұрын
I tried this one but when I added starch solution, no blue or black colour produced. What is the reason for that?
@MicroChemsExperiments Жыл бұрын
Prepare your reagents freshly and try again. If same result found, you can interpret the result as 'Nil'
@ovaneschakoyan65843 жыл бұрын
is it necessary to shake the sample with potassium iodide in dark conditions or this is has no influence on analysis.
@MicroChemsExperiments3 жыл бұрын
You dont need to keep the sample in dark after adding KI solution.
@chernora.mconteh54498 ай бұрын
Please can you assist me with the soft copy of this method
@narendrakamatkar52994 ай бұрын
Phosphate content by spectrophotometer with graph video upload
@MicroChemsExperiments4 ай бұрын
Noted
@SohelRana-ln7bg2 жыл бұрын
Pls make the video of preparation & standardization 0.1 N/M of Potassium Dichromatte
@MicroChemsExperiments2 жыл бұрын
Ok. We will make. Please stay with us
@luzdelunalopezaleman926011 ай бұрын
Hola, buenas tardes. Podría aclararme una duda que tengo?
@MicroChemsExperiments10 ай бұрын
Yes. Sure. Write us at mail.mic.chem@gmail.com
@udaykumarkachrola74942 жыл бұрын
Why you add .02g Sodium carbonate in Sodium thiosulfate solution ?
@MicroChemsExperiments2 жыл бұрын
AOAC method said so
@shraddhapiligaonkar3639 Жыл бұрын
Is there any replacement for chloroform can dichloromethane be used in place of chloroform?
@MicroChemsExperiments Жыл бұрын
Not sure and no replacement to be known actually.
@sadiyasajad81762 жыл бұрын
Hello mam.. I wanted to know if i had to calculate the peroxide value of meat sample.. Is it that i had to extract the fat using soxhlet method and to that extracted fat only i can go for checking peroxide value... Cant i homogenise the meat samlpe directly in water and check the peroxide value of the homogenised sample..
@MicroChemsExperiments2 жыл бұрын
You can check peroxide Value directly using the blended meat sample.
@jo-pr2zd Жыл бұрын
Why did you add sodium carbonate?
@MicroChemsExperiments Жыл бұрын
Standardization method said so
@killjadeskye10 ай бұрын
Anyone here have done Peroxide Value for virgin coconut oil? Does your sample turn black?
@user-bf8gt4du9j Жыл бұрын
Sorry, why must add 30 mL distilled water and shake 1 min to mix ? I would thank you very much😢
@MicroChemsExperiments Жыл бұрын
In large volume of solution, the color of the end point of the titration is more easier to be seen. Water is added to increase the volume of the solution
@mariaph97002 жыл бұрын
Does it matter if I add the thiosulfate while stirring or not? When I add thiosulfate and wait a little bit versus when I add it while stirring, it yields 2 different results. I am not sure which is right. Please help me explain. thanks
@MicroChemsExperiments Жыл бұрын
Add thiosulfate while stirring
@mariaph9700 Жыл бұрын
How fast should I add it?
@SwhyBe2 жыл бұрын
For sodium thiosulfate I found supplier that sell this solution and its standard already ? Do I need to standardise it after opening?
@MicroChemsExperiments Жыл бұрын
No need to standardise again.
@jancy98 Жыл бұрын
Can u plz share the calculation for the amount of sodium thiosulphate to taken in reagent preparation?
@MicroChemsExperiments Жыл бұрын
Please take help from Google
@umaimakamal97952 жыл бұрын
My teacher asked what is the relationship between cloud point and melting point do u know?
@MicroChemsExperiments2 жыл бұрын
Take help from Google
@factxfact55493 жыл бұрын
Is peroxide value test enough to check if the oil is rancid or not?
@MicroChemsExperiments3 жыл бұрын
No. Not enough. Peroxide value just gives an primary indication of Rancidity. You must go for the rancidity test to confirm. We have recently uploaded Rancidity test video. Plzz follow that video for details about rancidity test.
@munmunkundu9033 Жыл бұрын
Can i do this experiment with maize parts
@MicroChemsExperiments Жыл бұрын
No idea. You can try
@doobydoes49562 жыл бұрын
I read you can use cyclohexane for the organic solvent instead of chloroform. Is that true?
@doobydoes49562 жыл бұрын
CYCLOHEXANE DOES INFACT WORK. YOU NEED TO PIT IN 3 GRAMS OF SAMPLE, 50ML ORGANIC SOLVENT AND 100ML WATER 🔥
@MicroChemsExperiments Жыл бұрын
Yup
@SwhyBe2 жыл бұрын
I have tested body oil of brand and peroxide value is 34 does that mean is not good in quality ?
@MicroChemsExperiments Жыл бұрын
Yes. Not good in quality of that oil
@arslanmunir9334 Жыл бұрын
I am facing the problem related to Indicator. When I add 1% starch indicator ,No Color change observe. Can you please resolve this issue OR give any suggestion?
@arslanmunir9334 Жыл бұрын
As I use freshly prepare KI and Starch Indicator.
@sweathaswea46602 жыл бұрын
When I m adding starch solutions tha sample colour not turn black colour it will be in yellow (for ghee sample ) give me solutions
@MicroChemsExperiments2 жыл бұрын
Prepare potassium Iodide and Starch solution freshly on the day of analysis.
@azaruameer39312 жыл бұрын
Can you give me the "Determination of Oil Analysis" manual if I need it?
@MicroChemsExperiments2 жыл бұрын
We do not provide any document
@amaankambar638111 ай бұрын
Can u plz explain mam about 1000 in the calculation plz
@MicroChemsExperiments10 ай бұрын
It is a Factor
@khandhanish61543 жыл бұрын
Sir may be most of the oil are not showing blue colour when added the starch solution...
@MicroChemsExperiments3 жыл бұрын
Color depends on the peroxide value of sample. Without blank conduction, you can get the accurate results by following this video.
@khandhanish61543 жыл бұрын
Total 2percent contain.......so it will show blue or not?
@halaawwad21433 жыл бұрын
Should you do the plank experience? If so, how?
@MicroChemsExperiments3 жыл бұрын
The question is not relevant to the video
@trucminguyen95102 жыл бұрын
Please help me explain, In this test, do we need to titrate the blanc sample? This video are very helpfull, thank you so much.
@MicroChemsExperiments2 жыл бұрын
Yes. We need to tritrate our sample after dissolving in ethanol by heating.
@trucminguyen95102 жыл бұрын
@@MicroChemsExperiments how to titrate the blanc sample? Can i change sample test to distill water
@kimmytran99732 жыл бұрын
@@trucminguyen9510 in my lab we titrate the blank the same as the sample, except that there’s no oil added. Blank reading less than 0.05ml is acceptable in my lab.
@trucminguyen95102 жыл бұрын
@@kimmytran9973 thank you so much
@EliElordi Жыл бұрын
@@kimmytran9973 hi, may I know how your side prepare the blank? I did follow the method but my blank always end up higher than 0.10, often I get around 0.30 to 0.70ml which is quite high. The procedure I use is as follow: 1) 50ml acetic acid/isooctane into 250ml flask 2) add 30ml reagent water, swirl to mix and add 1ml saturated KI 3) Add 0.50ml starch (blue colour appears) and titrate to endpoint (white). What would cause my blank to be so high? I did prepare new starch and new KI solution but still can't get low blank
@newsofislam12842 жыл бұрын
After adding Saturated KI solution may need to insert corck immediately?
@MicroChemsExperiments2 жыл бұрын
Yes
@newsofislam12842 жыл бұрын
You are not showing that.
@MicroChemsExperiments2 жыл бұрын
@@newsofislam1284 That was our error occurred to make the video faster. But you should follow what you said in your lab
@newsofislam12842 жыл бұрын
Thanks a lot.
@lorenzycodo6972 жыл бұрын
please please can you explain how to standardise the sodium thiosulphate
@MicroChemsExperiments2 жыл бұрын
kzfaq.info/get/bejne/jph7paWX07HbYmg.html
@parmjeetsingh41673 жыл бұрын
Dear madam please make a vedio for wijj solution ..how it impact iodine value...
@MicroChemsExperiments3 жыл бұрын
Okay. I will make video on it as early as possible. Stay with us.
@gadajacygad83003 жыл бұрын
In your calculations you've calculated the normality of Sodium Thiosulfate. As far as I know equation for normality is N=M*n . Where M is number of moles per Litr and n is the n-factor. In your experiment you used 0.01M Sodium thiosulfate so M=0.01. And I think that the n-factor of Sodium thiosulfate is 2 as it dissolves into 2Na+ and (S2O3)2-. So 0.01*2=0.02N. Nevertheless, in your calculation you've written that N=0.01. Is it a calculation mistake or I don't fully understand calculations? I need this information because I need to calculate the peroxide value in my experiment.
@MicroChemsExperiments3 жыл бұрын
Gadajacy Gad, We used 0.1M sodium thiosulfate solution in this test. You can look at our preparation of sodium thiosulfate. We diluted 25g sodium thiosulfate crystal in 1000ml water which makes 0.1M sodium thiosulfate. But in sayings and in the subtitle we said about 0.1N instead of 0.1M. It was our silly mistake. Just avoid the mistake and forget about Normality. You can follow the whole calculation and method strictly to test the peroxide value. So ignore about normality and consider 0.1N as 0.1M. It should be 0.1M, not 0.1N. Thanks for your observations.
@gadajacygad83003 жыл бұрын
@@MicroChemsExperiments Thank you for explaining it to me
@MicroChemsExperiments3 жыл бұрын
@@gadajacygad8300 you are most welcome.
@dilshaniweragama72272 жыл бұрын
@@MicroChemsExperiments But you mentioned that you diluted 0.25 sodium thiosulfate in 100mL of water (0.0025),and here you mention that you dissolved 25g in 1000ml (0.025). which method is the correct one? thanks.
@Kindly_Her Жыл бұрын
Where is the 1000 coming from😢, i am confused 😊
@Krhula3 жыл бұрын
What research question can be formed out of this experiment for IB experiment?
@MicroChemsExperiments3 жыл бұрын
Thanks for asking tha question but we have only concern with the experiments, relating our videos. We have no idea about questionnaire and we are very sorry for that.
@SohelRana-ln7bg3 жыл бұрын
How to standardize sodium thiosulfate by patassium dichromate?
@MicroChemsExperiments3 жыл бұрын
Link: kzfaq.info/get/bejne/jph7paWX07HbYmg.html Did you watch my video list. Please search your asking test from my video list.
@rashibhasan8733 жыл бұрын
Dear, Mam. I prepared Sodium thiosulphate (0.01N) solution using your formula and tried to determine the peroxide value.But Blue color of the final mixture is not changing even after adding more than 100 ml (Na2S2O3.5H2O). Then my prepared soln even is not working during standardization of sodium thyosulphate by K2Cr2o7. Where is the problem mam,Is there any problem in Na2s203.5H2O solid.
@MicroChemsExperiments3 жыл бұрын
Yes. May be there is a problem with your sodium thiosulfate crystal. It should not be happened what you said. Otherwise there is problem in glassware and apparatus cleaning. Plzz watch the video again and do the experiment again using clean glassware and apparatus and preparing chemicals and reagents accurately & freshly. After that let us know the result. We will try to find the problem and give you a solution.
@rashibhasan8733 жыл бұрын
@@MicroChemsExperimentsi tried and still trying to solve the problem. I cleaned my apparatus using 32% HCL, then washed several times with Distilled water and dried using hot plate and the burette was rinsed by the sodium thyosulphate solution. Using your video I determined acid value successfully but in determining peroxide value it is not working. I used freshly prepared KI and starch indicator and as the solution turns to blue implies that both KI and starch indicator are in good condition but problem crops up when using sodium thyosulphate. So where is the problem.
@MicroChemsExperiments3 жыл бұрын
@@rashibhasan873 Test another sample brought from local market and test again. If your problm is not solved then replace sodium thiosulfate reagent by a new one of good brand & supplier.
@rashibhasan8733 жыл бұрын
@@MicroChemsExperiments I conducted the experiment several times but it is not working.I am currently using sodium thyosulphate pellets imported from Merck specialities Private Ltd, Worli, India. Which brand should I use instead to get over this problem?
@MicroChemsExperiments3 жыл бұрын
@@rashibhasan873 before changing the chemicals, conduct a test for another saybean oil sample purchased from the local market.
@SwhyBe3 жыл бұрын
Great video can please mention the concentration % of acetic acid
@MicroChemsExperiments3 жыл бұрын
We used Glacial Acetic Acid (99.5%)
@SwhyBe3 жыл бұрын
@@MicroChemsExperiments perfect one more question can I purchase 0.0109N solution already prepared and standardised will it work for this experiment?
@MicroChemsExperiments3 жыл бұрын
@@SwhyBe Yes. You can purchase 0.01N solution from local market and can use in this experiment. If you face any difficulty to purchase they follow our video for the preparation and standardization: kzfaq.info/get/bejne/jph7paWX07HbYmg.html
@SwhyBe3 жыл бұрын
@@MicroChemsExperiments its not 0.01N actually it is 0.0109 N will this effect the experiment?
@MicroChemsExperiments3 жыл бұрын
@@SwhyBe No problm with it
@bablubadmash94082 жыл бұрын
0.5 g starch soluble added in how much ml of water?
@newsofislam12842 жыл бұрын
50 ml
@chuqiaomai2903 жыл бұрын
Can you use this method to determine peroxide value in dried milk powder?
@MicroChemsExperiments3 жыл бұрын
Yes. You can
@chuqiaomai2903 жыл бұрын
@@MicroChemsExperiments Great thank you so much! Do I need to extract fat from the powder first or the method can be applied to milk powder directly?
@MicroChemsExperiments3 жыл бұрын
You have to extract fat first using Hexane or Ether solvent. Then go for the analysis
@shwetabhoir94032 жыл бұрын
can you share determination of Methylene blue value of carbon
@MicroChemsExperiments2 жыл бұрын
Noted.
@mahedihasan-fq2oc11 ай бұрын
I need 0.01 sodium thiosulfat solution
@sweathaswea46602 жыл бұрын
Can we use for titration 0.1 n sodium thiosulfate
@MicroChemsExperiments2 жыл бұрын
No. If you use 0.1N instead of 0.01N then you will not get the accurate result of peroxide value.
@oumaimaazakak72853 жыл бұрын
Hello Miss, please I wanna know the average of peroxide value that we can get in our experiment for known is the oil have a good quality or not and thanks in advance.
@MicroChemsExperiments3 жыл бұрын
Lower peroxide value indicates the good quality of oil. Quality decreases with the increasing peroxide value.
@oumaimaazakak72853 жыл бұрын
Thank you so much 🥰
@oumaimaazakak72853 жыл бұрын
I have another question about the blank, when I use a blank in this experiment and start my titration on it With thiosulfate of sodium what's the value shall I get when my blank pass to a colorful solution to a colorless solution.
@MicroChemsExperiments3 жыл бұрын
@@oumaimaazakak7285 It varies with many conditions or parameters. Plz conduct the test in your lab to get the more idea.