Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

what is rs test why we are perfoming rs test

2 9521

In GC calibration,what is the procedure to calibrate the TCD (thermal counductivity detector)suggest ?



What is difference between silica used in TLC and HPLC column

Cipla, Meghmani Organics,

4 17681

Why Urasil and Caffeine use for HPLC wavelength accuracy calibration. which is most suitable, Why? other than these which can be used?


7 16891

When we r doing processing method for sst in Empower software by HPLC, What value has to give in void volume and as per which pharmacopia!

Micro Labs, Mylan,

5 13366

what is use of acetonitrile compare to methanol in RP-HPLC Method devlopment

Neuland, Orchid,

7 21986

is a bonded water molecule in an organic material can be easlisy and accuractly determined by KF rather than LOD

2 6655

How to know HPLC column performance?

Meghmani Organics,

4 11688

What is heavy water

Meghmani Organics,

3 7724

What will be the effect on HPLC analysis result if three mobile phases given separately through three valves and same proportion mixed together and given by one valve?


1 4492

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


Why PH range from 0to14.

College School Exams Tests, Reddy Labs, Wings Customer Care,

2 13117

why you are using benzoic acid for water content determination in TEA

2 6842

difference between instrumenent and equipment

6 12055

mixed 1.0 ml of methanol and 1.0 ml of toluene and injected in gas chromatography.will you prove that both solvents are in the ratio 1:1(not by area normalization)

1 2892

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Un-Answered Questions { Analytical Chemistry }

4. Describe the operation of the Craig apparatus. Chapter.3 Equilibrium Processes in Separations


why holium oxide prepared in 10% HCLO4 SOLUTION


How to determine the EDTA content by potentiometry titration in Ceftriaxine sodium


How require to develop GC method? how to select diluent, GAS, column selection and other chromatographic conditions?


USP methodology, EP methodology, IP methodology, among three if possible to use one methodology for qualify working standard to use USP, EP, IP ? Please explain...


what is %labelled amount in content uniformity of dosage unit and its calculation?


if identification threshold crosses the limits then what next step?


can i use hplc detector to uplc and why?


What is a difference between potency and purity?


what is partion and column chromatography


why multimedia dissolution require to do?


what parameters we will consider while developing a HPLC method and how we confirm our HPLC method is valid?


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


some product having water content method with pyridine and ethylene glycol mixture instead of methanol? how they are selecting and methanol is not suitable solvent how ?


How to decide assay range for non pharmacopeial API analysis by HPLC? Could you give me any reference for same e.g Guidelines or Paper publications?