Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

How can you prepare 0.1% Phosphate buffer solution?

6 12227

wat is the role of michelson interferometer in FTIR and He-Ne lase.detailed answer required in simple language

Police Constable,

1 2370

difference between quality and quantity

3 11647

why we get only one peak in assay by hplc but in rs by hplc get more peaks

MSN Pharma,

1 10684

In performance Check of GC Why Hexadecane Peak is Considered 

Asian Paints, MSN Pharma,

2543

Is it required to inject 6 injections for % RSD of a system suitability in lc or gc

Raks Pharma,

3 12122

Why do we use KCl ,K2Cr207,Toulene & Halonium oxide for the caliberation of UV

Apotex,

2 15253

what is rt and rrt? how we find rrt? relation between rt and rrt/

Cadila,

1 17161

why the ph scale range is 1 t0 14 and why not beyond 14 and not to below 1?

Avra, Granules, Orchid,

5 20097

What is method validation in quality control

Alchem,

1 4057

Why we use uracil and caffeine in hplc calibration

Alchem, Reddy Labs,

6 27574

If mass balance is not passing in forced degradation in method validation that method is suitable or not?

Aurobindo, Dr Reddys, Reddy Labs, Wockhardt,

1 7957

Why we compare unequal concentrated solutions in heavy metals test. For example comparing the test solution with 1 ppm lead standard and telling it's less than 20ppm?

Micro Labs, Mistair,

1 6996

What is the reason for negative peak in HPLC while using UV detector.

2 14714

What is the reason of RT change in new column v/s old column in HPLC

Apex,

3 16662


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Un-Answered Questions { Analytical Chemistry }

From where require to take the RLD sample?

266


in which situation ion pair agent require to use?

260


Which parameters require to do in tech transfer?

258


If vendor having more imp than monograph then how to proceed? and how to set spec?

326


why we are using benzene, anyline in acetic anhdride assay titration method?

1565






which batch require to use for analytical method validation?

321


Explain the relations between number of carbon atoms in alkanes and retention time ?

1618


in monograph 7 imp are there but in vendor showing 5 imp do not req to include 2 imp for that what will be justification?

254


what you do when compound having dwel wavelength?

267


can we use the same detector in HPLC as well GC and what could be the differences we can find in the final chromato graph in any aspects?

1695


UV and PDA detector, which have less signal to noise ratio?

632


why require to do water content for drug product?

306


In the isomers,enantiomers give the only physical properties present such that no chemical properties present.

1765


How can I develope method of dissolution by HPLC OR UV

1882


In the HPLC Calibration done wavelength accuracy done between 200nm-280nm .but not done remaining 300-400nm not done ?

448