Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

In dissolution test s1 stage we are getting one bowl 40 % out of 6 bowls what is the root cause you find and how proceed next step? ( Q is 80%)

Reddy Labs,


why we inject sample TWICE in ASSAY by HPLC analysis but in RS once?

Aurobindo, Neuland, DRL,

4 5786

What id the resolution factor

1 1777

what is a placebo peak

GMP Pharma, Optimus,

2 2110

what is the effect of injection volume calculate flow rate in perkin elmer headspace? (ccm parameter in HS)

1 723

How can we calculates the solubility of the drug in different medias by injecting in to hplc????(solubility studies)

Super Pharmaceuticals,

2 1835

What is the use of Holmium (III) Oxide???

Finar Chemicals,

1 2580

India is. Under which zone as per QF1.?

Aurobindo, Gland Pharma, Acebright,

3 5961

how to calculate the Step and ripple accuracy for pump gradient test for UPLC?


1 3089

why salicylic acid not use for dissolution.

Cipla, Indo Baijin Chemicals,

1 2505

Which water can use Hplc analysis

Dr Reddys, BioGenomics, Reddy Labs,

9 5634

if you have given a blank water how you analyse by general analytical techniques?


what is the analytical procedure for COD and BoD


1 2123

Why pH lies between 0 to 14 only

PI Industries, Unimark Remedies,

4 5461

In chromatograpbic purity 90% is there, in assay 70% is there. How will you prove remaining 30%.

Dr Reddys,

3 4226

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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.


what is the principle of UV Vis spectroscopy, AAS, ICP OES,ICPAES, ICP-MS and FTIR


if you have given a blank water how you analyse by general analytical techniques?


explain 5 components of gas chromatography ?


During Validation study, Recovery is passing at all levels but Linearity is failing. Justify?


For titration in anhydrous media with perchloric acide, if lack of titrator, Which indicator is been used for replacement. How calculate pH of test solution to choose suitable indicator?


What is the principle of Thermal conductivity detector and FID?


what is difference between UV - VISIBLE MODEL NO like 1600,1601,1700 etc ? plz explain me


how to calibrate hplc & gc


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


In HPLC calibration, caffeine is used as primary standard for wave length calibration due to caffeine is having dual maxima at 273 & 205 nm and one minima at 245 nm. Any body can give reference of these details from any pharmacopeia (with chapter no.) or any other authentic guideline?


What is aggregate and fragments in SEC?


process of Diclofenac sodium,IP.


While performing TOC sst analysis Zero shift disabled & sample analysis zero shift enabled why?


If we do accuracy at same concentration at which linearity planned,what is the need to do linearity separately?