How to determine water content of thioanisole? which
interfere by KF titration?

Answer Posted / ashok babu jha

Procedure:
30 mL methanol +3 g imidazole +1g N-
Ethylmaleinimide . Titrte to dryness , add approx.03 g
sample from a dry syringe without needle , allow to react
under stirring for 5 min and then titrate the water content
with KF reagent.Ethylmaleinimide form covalent bonds with
sulfhydryl groups at pH 6.5-7.5 .

Is This Answer Correct ?    3 Yes 1 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

Why six unit used for precision?

807


all types of questions asked at the cipla interview

4139


How to calculate coreletion coefficient

1142


what is mean by nitrosamine impurities?

546


If suppose 10 methods of dissolution given in pharmacopoeial for single content product then which method out of 10? or all 10 require to follow?

531






How to choose the which salt is suitable for mobilephase

2659


why digestion require in icpms?

309


I have compare C2H2-air and C2H2-N2O flame AAS on determination calcium. Both use same range of std to plot calibration curve. (2-6ppm) When i measure the sample with phosphate, KCl and LaCl, C2H2-N2O flame give false positive result, around 0.5ppm. When i measure the sample with phosphste, KCl and EDTA. C2H2-N2O flame also give 0.5ppm false positive. But both above mentioned sample would not give false positive when measured by C2H2-air flame. What is the reason?

2981


we are performed SOR for a particular product the limit is -6 to -10.We face particular bathes it is not meeting the specification.we performed diffrent instrument diffrent analyst we are getting diffrent diffrent results.solvent is dimethyl sulfoxide what could be the reasion

1360


How to fix the sample conc. in Related substances test by HPLC?

615


what is definition of validation? which components are followed give detail?

1831


What is the accrptance criteria in RSD for RS method precision on basis of impurity percentages?

313


what is the principle involved in turbidometry and nephelometry ?

3636


What is stray light in uv what are units for stray light

1026


If change in specification which parameter require to do for validation? if change in chromtographic condition then which parameter? if api change then which parameter? if change composition then which parameter? if old method not work out then whicj parameter? if additional one impurity added then which parameter of validation require to do on above each conditions? elaborate separately

361