Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

how can u seperate polar compounds in hplc ?

Meditab, Piramal Healthcare,

1 5121

what is the difference between hplc and uplc?

Mylan, Fresenius Kabi,

5 5736

what is the basis of separation in chromatography?

Anthem,

1 4138




what is the diference between spectroscopy and chromatography

Cipla, PharmChem, Reliance,

2 7895

Why we have to take 42gm of sodium hydroxide instead of 40gm for preparation of 1M Sodium hydroxide as per Pharmacopia? Whether it means the formula for calculating molarity was wrong? 

Ranbaxy, Claris Otsuka,

3 6161

what is internal standard define

Apex, Hikma Pharmaceuticals, IPCA, Coromandel International Limited,

2 1870

pharma industries oriented

Apex, Micro Labs, Zydus Cadila,

959

gc Calibration % RSD failed what is the possible reasons?

Divis Laboratories,

4 6781




What is the procedure for the calibration of ph meter?

IBS,

1 2309

What are the parameters for the method development of Gas Chromatography and GC-HS? 

2 3225

What is the difference between purge septum flow and column flow in gas chromatography?

903

how much mass should be there in volumetric flask while in preparation of sample for assay? 

Reddy Labs,

1344

U have 4 strengths have different coating meterial which one u chose to do forced degradation stady in validation

Reddy Labs,

1 2135

Tell me about analytical method validation in QC

Petronas,

2554

what is procedure of actual procedure for registration of drug?

767


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Un-Answered Questions { Analytical Chemistry }

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

1461


calibrtion procedue of LC-MS

1389


Why use only methanol,used determinationof moisture content not use other solvents

15


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?

1016


in dissolution in one tablets two molecule one is losartan & second is HCTZ losartam is complies in s1 stage & hctz is complies in s2 stage then how to report result losartan s1 stage result or losartan s2 stage result

1016






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

823


what is difference in ods I ods II is this is realy from sorbent / packing characteristics or from other means

836


Tell me something about Vitamin A test method by HPLC

1484


How to start the dissolution development for unknown tab?

449


why we are using hexane in calibration of number of drop per mL

355


In IR spectra, generally a molecule vibrates without apply emr or ir light?

686


As per ICH related substances stability trend limit from initial to shelf life

1919


when we talk about change in entropy we consider total entropy means of surround +entropy of system but when we talk about change in Gibss free energy we consider entropy of system.explain with reason.

889


How can we confirm the HPLC column is end-capped or not? Is it possible to identify by physical appearance?

1977


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

2240