Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

how can u seperate polar compounds in hplc ?

Meditab, Piramal Healthcare,

1 4959

what is the difference between hplc and uplc?

Mylan, Fresenius Kabi,

5 5547

what is the basis of separation in chromatography?

Anthem,

1 4015




what is the diference between spectroscopy and chromatography

Cipla, PharmChem, Reliance,

2 7615

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 5693

what is internal standard define

Apex, Hikma Pharmaceuticals, IPCA, Coromandel International Limited,

2 1729

pharma industries oriented

Apex, Micro Labs, Zydus Cadila,

907

gc Calibration % RSD failed what is the possible reasons?

Divis Laboratories,

4 6321




What is the procedure for the calibration of ph meter?

IBS,

1 2185

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

2 3121

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

859

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

Reddy Labs,

1265

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

Reddy Labs,

1 2041

Tell me about analytical method validation in QC

Petronas,

2244

what is procedure of actual procedure for registration of drug?

721


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Un-Answered Questions { Analytical Chemistry }

how to calibrate hplc & gc

3180


What is the principle of HPLC, GC, LCMS, GCMS,LC QQQ, GC QQQ, LC Q TOF and GC Q TOF. What are the applications and Specificity?

6223


What is the purpose of octyl silane columns?

2813


In performance Check of GC Why Hexadecane Peak is Considered 

1844


calibrtion procedue of LC-MS

1335






what is lod and loq ?,why use k2cr2o7 , kcl h2so4 in uv calibration ?,why use benzophenone & caffene acetone in hplc calibration ?,what is leading peak in hplc ?why we do the calibration of limit of stry light in hplc & uv ?

2226


what is turbidimetric titration?Give 2 examples.

1189


Colorimtry

293


Many times I don't got a caffeine peak in calibration of hplc using guard column ❓

26


Identify problem faced when mass spectroscopy is used with HPLC system ?

754


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

1355


What is aggregate and fragments in SEC?

733


How we performed the force degradation for drug substance, is any specific guideline is available for each parameter(Acidic, basic, oxidation,heat)? what conditions you mentained for above parameters.

1095


what is different when impergnated silica plates are used in separation of azo dyes using column chromatography?

753


WHAT IS THE CRITERIA FOR SELECTION OF TIME OF DISSOLUTION AND THE MEDIUM OF DISSOLUTION?

1447