Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

What is difference between Potency & purity

3 10360

how to hplc calibrated

Glochem, Dr Reddys,

4 42352

state the principle of gas chromatography?

5 8360




Why noise test is performed at 254 nm in calibration of HPLC system?

4 12168

some compound havving uv region but not give much more response during hplc analysis

2 4403

I have got selected for Aurobindo Pharma AR&D, HR person is asking me to sign in agreement. can I join?

Aurobindo,

19 27766

Why sulfuric acid is used in sulphated ash / residue on ignition test.

Dr Reddys, Micro Labs, Wings Customer Care, Samrudh, Watson Pharmaceuticals, HPLC, CS Pharmaceuticals, GVK,

8 49573

what are the basic requirement for the WHO audit?

BioPlus,

1 6569




What is the thickness of polystyrene film?

Pharmaffiliates Analytics and Synthetics,

8 11495

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

Torrent Pharma, Mylan,

1 1538

What is Stray light ? & what is the IMP of this

2 7098

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

959

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

927

why we use only sucrose in the calibration of polarimeter?

Kilitch,

5 15552

What is the Deference between Bulk density & Tap density ?

Reddy Labs, Hikma Pharmaceuticals, Neuland,

2 19138


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Un-Answered Questions { Analytical Chemistry }

How will u perform degradation study in detectors other thann PDA in HPLC Methodology

1202


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

5871


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

1020


how to get accurate result for Residue on evaporation in purified water

245


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?

844






How do we quantify crystaline and amarpous forms by using (NMR, XRD)spectroscopic techniques? Which any others instruments are useful for this quantification? explain

1121


How would you decide dissolution medium for NCE compound of class I drug

689


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

1163


can we use the same detector in HPLC as well GC and what could be the differences we can find in the final chromato graph in any aspects?

887


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

1260


A ha tc is actual defination of retention time?

192


what is separation techniques.

1311


How to start the dissolution development for unknown tab?

271


function of detecter in hplc ,gc and spectroscopy? function of carrier gas in gc?

1177


Why to use propyl paraben in HPLC gradient calibration

386