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 9478

What is the procedure for UV-spectrophotometer calibration?

6 60505

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

4 14090

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,

2863

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

NCL,

3389

How can we Qualify a unknown impurity by HPLC

3 11948

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

Orchid,

10 35287

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

Hikal, Lupin, Wockhardt,

25 116752

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

Dr Reddys, RB,

2 27867

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

7 26502

why the same column give different retention time in hplc?

7 14509

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

5 14346

What is the major difference b/w Drift and Noise

Aurobindo, Dr Reddys, Reddy Labs,

4 37643

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

Quintiles,

3 13553

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

Cipla,

2 8909


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Un-Answered Questions { Analytical Chemistry }

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

2318


what is third integration

1496


please explian me about area normalisation method,diluted standard method,impurity vs impurity and which one has to be selected in method development

1098


What should be the level/ Percentage of Arsenic in Arsenic free zinc.

1760


What is similarity factor and its use in api strength?

794






In GC calibration,what is the procedure to calibrate the TCD (thermal counductivity detector)suggest ?

2707


how will you do the prep for unstable componds?

1437


How can we calculate "confidence interval" in analytical method validation? Pl. explain with example.

3595


what are the standard methods for HPLC?

2240


UV and PDA detector, which have less signal to noise ratio?

640


how you start RS method development when for new product?

288


what is turbidimetric titration?Give 2 examples.

1986


what is the disso medium for tropsiun chloride

1797


How can we calculate offset value pH measurment

1069


What is Band broading effect explain

1400