Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

why plane of polarized light rotated by opticaly active compunds?

Glenmark,

1 1842

why plane of polarized light rotated by opticaly active compunds?

Glenmark,

1 5301

Can any one tell what is RECALL OF PROCEDURES is

Macleods,

1 1242




what is the difference between capillary and glass column in GC

1 5301

differance between L1 and L7 columns

Everest,

5 14943

what is basc principle of the HPLC,IR,UV AND GC? what is difference between diffusion spectra and transmision spectra in IR?

Torrent Pharma, GICC, Mylan, Sygene, Dr Reddys, Zydus Cadila, Cadila,

1 17495

plz tall me that any pharmacopeia and guideline is par meted to use 1.68,4.01,7.00,9.00,12.45 buffer for ph meter calibration

Torrent Pharma,

1 1351

In pharmaceuticals formulation OOS applicable in Raw Material(which is not manufacturing in the company. and purchase by approved vendor)).Why?

Orchid,

1 5573




why we use only six bowls for dissolution of a drug

Cipla, Natco, TelePerformance,

1 14483

On which pharmacopoeia basis we can calibrate instruments like HPLC,GC,UV,DISSO,IR etc...

Laurus, Cipla, Micro Labs,

9 15729

why PH range 0-14 explain

Saint Gobain, DRL, Reddy Labs, Viva,

5 50741

How to make up 100ml of a solution cintaining compound A at 95µg/ml and compound B at30µg/ml for an HPLC reference standard.

2 3940

why we prefer kbr for ftir than kcl?

Aurobindo,

5 8846

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

Vimta Labs, Graviti Pharmaceuticals,

1089

EXPLAIN THE CALCULATION PART OF AN KF TITRATOR CALIBRATION WITH SUITABLE EXAMPLE

1234


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Un-Answered Questions { Analytical Chemistry }

In dissolution of tablets/capsules elaborate the Dissolution limit 20.0% to 60% Q in 30 minutes.

653


what is DIPE limit in residual solvent?

342


why does used dry caffien in HPLC calibration?

500


why disodium tartarate used in karl-fischer instrument ?.

609


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?

5474






What is control room temperature and which guide line says?

252


What is the difference between known and unknown impurities?

157


What is gelatinization?

307


what is third integration

635


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

1348


Why dissolution test is not performed in all of the products

1101


about method developement in hplc

322


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

2015


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.

928


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?

1776