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 5882

What is column in chromatography?

Chembond Chemicals,

723

Which Pharmacopiea follow calibration of HPLC,GC

Reddy Labs, Bayer,

3 5629




Why Holium cholorate used in UV Spectro photometer?

Reddy Labs,

7 5543

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

Nirma,

1 3005

Why water not directed by FID detector 

Amoli Organics, Lupin,

1 3338

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

824

how the compound separate in coulunm,explain

Wockhardt,

926




What is the principle of HPLC?

Cipla, Lupin,

3 5729

Why methanol & acetonitrile is mostly used for hplc analysis?

DRL,

2 8245

Explain about empower software of analysing?

DRL,

1 3234

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

Raks Pharma,

843

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

Student,

1 2101

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

Beni Suef University, Sri Krishna Pharmaceuticals, Graviti Pharmaceuticals,

646

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 5574


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Un-Answered Questions { Analytical Chemistry }

How do we get end points and how many end points are possible for citric acid and di-acid not theorotically answer should be given practically.

1135


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

631


In HPLC Calibration, On which basis RSD Limit of noise test is fixed (NMT 33.0 % )

1890


Why sodium hydroxide used for maintain pH of phosphate buffer

823


what type of questions asked on analytical balance and also give answers................all pharma companies?

5517






We use Potassium Dichromate solution for the calibration of UV-Visible Spectrophotometer in UV region. My question is to calibrate visible region which solution could be used in photometric accuracy

12


acceptance criteria for lod & loq by standard deviation of response and slope??

1080


Principle of single pan analytical balance

3491


what is separation techniques.

1269


Why do we use KMnO4 in the test of control of obsorbance ? and why do we take specific quantity i.e 57-63mg?

1190


Which products will produce when acetic anhydride reacts with Ter-butanol, Sec-butanol, Iso butanol, Dimethylamine etc.

1336


How to calculation of residual solvent methanol (3000 ppm) standard solution, and how many quantity used of test sample

860


what is the limit for KF Factor ,we take factor using water we will found factor between 6 to 7 ,while on KF Reagent bottle mentioned 5 mg/ml water content.if we not use dried methanol it is effect on factor.

624


please explian me about area normalisation method,diluted standard method,impurity vs impurity and which one has to be selected in method development

243


pharma industries oriented

751