Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

WHICH PRESSURE IS HIGH EITHER INJECTOR OR DETECTOR IN GAS CHROMATOGRAPHY

Avon Organics, Dr Reddys, Reddy Labs,

4 9358

What is the procedure for UV-spectrophotometer calibration?

6 60329

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

4 13972

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,

2828

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

NCL,

3349

How can we Qualify a unknown impurity by HPLC

3 11841

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

Orchid,

10 35000

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

Hikal, Lupin, Wockhardt,

25 116191

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

Dr Reddys, RB,

2 27777

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

7 26268

why the same column give different retention time in hplc?

7 14317

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

5 14216

What is the major difference b/w Drift and Noise

Aurobindo, Dr Reddys, Reddy Labs,

4 37478

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

Quintiles,

3 13437

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

Cipla,

2 8836


Post New Analytical Chemistry Questions

Un-Answered Questions { Analytical Chemistry }

which are the sizes of capsules?

362


What is intact assay method development.....?

1968


if you get peak in blank then what require to do?

448


Why Ethanol is Used for Standardization of GC Head space?

3676


which are the guidelines for force degradation studies?

259






What is the purpose of octyl silane columns?

3732


What is the accrptance criteria in RSD for RS method precision on basis of impurity percentages?

269


why octanol used to determine the partition coefficient ?

1878


is it necessary to do HPLC calibration at wavelength 315nm if we are doing analysis at this wavelangth

1608


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

8324


what is the different in Total ash, sulphated ash, acid insoluble ash, alcoholic or non alcoholic ash?

9333


what is the acceptance criteria for enteric coated tablets in 0.1n hcl validation in each parameter?

297


Colorimtry

1120


If change in specification which parameter require to do for validation? if change in chromtographic condition then which parameter? if api change then which parameter? if change composition then which parameter? if old method not work out then whicj parameter? if additional one impurity added then which parameter of validation require to do on above each conditions? elaborate separately

317


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

1382