Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

Can you please give a suitable definition and an example for understanding the words purity and potency.

Cipla, Reddy Labs, Malladi Drugs and Pharmaceuticals,

6 5698

What is column in chromatography?

Chembond Chemicals,


Which Pharmacopiea follow calibration of HPLC,GC

Reddy Labs, Bayer,

3 5407

Why Holium cholorate used in UV Spectro photometer?

Reddy Labs,

7 5305

why we get negative values in uv when i placed sample which has some concetration but not in standard


1 2850

Why water not directed by FID detector 

Amoli Organics, Lupin,

1 3191

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


how the compound separate in coulunm,explain



What is the principle of HPLC?

Cipla, Lupin,

3 5475

Why methanol & acetonitrile is mostly used for hplc analysis?


2 7582

Explain about empower software of analysing?


1 3092

why we use Dichlorobenzene.nitrobezine.t-butyldi sulhate.for calibration of gc Head space

Raks Pharma,


Why use the Omeprazole as a reference standard to estimate the assay of esomeprazole by HPLC method


1 2011

are there in uv lamb that is chractrestic for wavelenghth 205 nm ?????

Beni Suef University, Sri Krishna Pharmaceuticals, Graviti Pharmaceuticals,


In UV calibration we use Holmium perchlorate solution made in 1.4M perchloric acid The question is that 1.4 M perchloric acid we make is it in water or glacial acetic acid?

4 5155

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Un-Answered Questions { Analytical Chemistry }

1)What's the meaning of Absorption,give a example. 2)What's the meaning of Adsorption,give a example. 2)what is the difference between Absorption and Adsorption.


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?


In HPLC (Waters) software Empower1,2 &3 what is the updation for each version


what is turbidimetric titration?Give 2 examples.


What is the acceptance criteria for moisture balance when calibrated with sodium sulfate


how a particular wavelength can be different for a particular compund while analysing by uv and by HPLC.


What is intact assay method development.....?


for heavy metal test lead used in which form pure form or any other form for preparation of lead standard sol


process of Diclofenac sodium,IP.


effect of Ph during analytical run ?


why we use a particular hplc column for a particular compound give reasons?please


What are usp limits for theoritical plats,resoution,tailing factor,peak to valley ratio


How would you decide dissolution medium for NCE compound of class I drug


What is the principle of HPLC, GC, LCMS, GCMS,LC QQQ, GC QQQ, LC Q TOF and GC Q TOF. What are the applications and Specificity?


what type of question will ask in the interview of lab chemist.