Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

WHICH PRESSURE IS HIGH EITHER INJECTOR OR DETECTOR IN GAS CHROMATOGRAPHY

Reddy Labs, Avon Organics, Dr Reddys,

4 6749

What is the procedure for UV-spectrophotometer calibration?

6 54659

What should be the calibration procedure for wavelength accuracy in case of HPLC?

4 10959




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?

NCL,

1988

How to compare XRD graphs against standard and carry polymorpism study of API's by powder XRD method?

NCL,

2649

How can we Qualify a unknown impurity by HPLC

3 9695

full name of OOS & OOT ? Dercribe it with details ? why this is needed in pharma industry ?

Orchid,

10 28293

why KBr is used in FTIR SPECTROSCOPY and why is it necessary to triturate KBr during FTIR analysis?

Lupin, Hikal, Wockhardt,

25 99844




what is stability study ? why it is needed and how itis done

Dr Reddys, RB,

2 23499

why water, methanol, ethanol ets solvents are used in UV SPECTRIPHOTOMETER for blank reading ?

7 21151

why the same column give different retention time in hplc?

7 10749

How will decide to use HPLC OR GC for developing method for unkown compund

5 11265

What is the major difference b/w Drift and Noise

Aurobindo, Reddy Labs, Dr Reddys,

4 31069

what king of work is done in Regulatory Affairs in Pharma industry ?

Quintiles,

3 11509

can some other acids like nitric acid or HCl can be used in the calibration of UV.Vis. spectrophotometer????

Cipla,

2 7000


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Un-Answered Questions { Analytical Chemistry }

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

971


How much is the standard area for glc analysis

1017


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?

1988


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


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

1266






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

6330


what is the principle involved in turbidometry and nephelometry ?

2638


Home heating oil or furnace oil what is made from? Can (base oil plus diesel/kerosen) = home heating oil?

936


What is third generation HPLC Columns?

784


why are measure gas flow " ml " in Gas chromatography

447


how can I make the copper get white bye any salt or acit?

1050


WHAT IS THE PURPOSE WE USE HCL, CHOPPER, BURNER, MONOCHROMATOR in AAS? PLEASE EXPLAIN BRIEFLY

1168


What is the main difference between ODS1 and ODS2 Hplc column.

2147


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

887


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