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 9462

What is the procedure for UV-spectrophotometer calibration?

6 60470

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

4 14071

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,

2858

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

NCL,

3380

How can we Qualify a unknown impurity by HPLC

3 11932

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

Orchid,

10 35250

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

Hikal, Lupin, Wockhardt,

25 116688

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

Dr Reddys, RB,

2 27855

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

7 26471

why the same column give different retention time in hplc?

7 14464

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

5 14335

What is the major difference b/w Drift and Noise

Aurobindo, Dr Reddys, Reddy Labs,

4 37617

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

Quintiles,

3 13522

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

Cipla,

2 8895


Post New Analytical Chemistry Questions

Un-Answered Questions { Analytical Chemistry }

What is the acceptance criteria for moisture balance when calibrated with sodium sulfate

1542


How we can identify process related and degradation impurity in single method with short period?

323


why we use Dichlorobenzene.nitrobezine.t-butyldi sulhate.for calibration of gc Head space

1773


What is the difference between spectro meter and spectro photo meter?

10405


How to determine water content of bis tetrazole amine mono ammonium salt

2958






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

8413


How to start the dissolution development for unknown tab?

1136


Why six unit used for precision?

796


why multimedia dissolution require to do?

302


How to do regeneration of Metacarb Pb plus column?

2073


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

2134


Please tell me about the pH of Polycaboxylic ether is it in the 5-6 range ever or more than 6

2103


In rs method development when we are going area normalization method to dilute standard method?

938


we are performed SOR for a particular product the limit is -6 to -10.We face particular bathes it is not meeting the specification.we performed diffrent instrument diffrent analyst we are getting diffrent diffrent results.solvent is dimethyl sulfoxide what could be the reasion

1350


what is the purge flow & how to calculate

1968