Himanshu Gupta

4 Questions 9 Answers 0 Followers

Questions related from Himanshu Gupta

How, can i find the dead time using unretained thiourea on C18 column, I am using OCED guidelines 117 for determination of Partition coefficient?

I want to calculate the capacity factor for various R.T.s for that i need dead time t0 i.e. the average time a solvent molecule needs to pass the column and it can be measured using thiourea. Can...

12 December 2017 8,318 6 View

How to find the % purity of unknown technical grade material using reference standard? Which method should I adopt?

I have a technical grade material is approx. 4 year old. I would like to know how much its been degraded overtime. Basically, I would like to confirm the % purity of the active ingredient content...

07 July 2017 4,449 5 View

Hello everyone, can anyone help me with this?

I would like to know the percentage purity of some impurities in my test sample. The Ref. Standard, i am using has got the same impurities in it. The retention time of the impurities in my sample...

05 May 2017 1,259 6 View

Emamectin benzoate will show two different peaks or will it show only one peak for the quantification purpose using HPLC?

Background: Emamectin Benzoate is a mixture of > 90% emamectin B1a benzoate (M.W. 886.1) and < 10% emamectin B1b benzoa0te.(872.1).

03 March 2017 8,906 4 View