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Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

what is a differance between assay by HPLC and assay by titration?

5 25596

what is PH of 0.1N Hcl, 0.01N Hcl & Mehanol.

3 44804

what is batch no. of prednisole tablet.

Dr Reddys,

8 11939

HOW RRF IS CALCULATED IN HPLC

2 10265

why should we do limit of stray light in UV calibration and why should use potassium chloride

2 27392

why ph is between 0 to 14

Apotex, Reliance, Zydus Cadila,

6 20150

what is the definition of limit of stray light in UV calibration

FDC, Zydus Cadila,

1 23631

what is the dipolement and how it is related to IR

AJ Square Inc, Aurobindo,

1 6989

why we are using in ph calibrations ph4,7,9.2 buffers only?

Reddy Labs,

5 16111

why hexane is used for FID calibration in GC

Glochem,

1 3554

what is %labelled amount in content uniformity of dosage unit and its calculation?

Zydus Cadila,

4113

how to prepare 5normality of hcl

2 44261

in pentoperazole capsules usp why assay value is substract from dissolution

Ranbaxy,

1 2668

diference b/w packed &capilary columns

2 6566

how to prepare 5 normality of h2so4 solution

Symbiotec,

3 60883


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Un-Answered Questions { Analytical Chemistry }

how much mass should be there in volumetric flask while in preparation of sample for assay? 

1652


what is the extinction coefficient for Indomethacin or at 319nm wave length.

2998


how can give the expiry period and restadardisation of volumetric solution

1671


how to select short coloum and long coloumn for new molecule

1433


why sre you used Potassium hydrogen phthalate in standarisation of 1N NaOH and 0.1 N Perchloric Acid?

7807






Tell me something about Vitamin A test method by HPLC

1766


in gas chromatography what is the difference between gas flow rate and average linear velocity ?

1393


what is the importence and role of LCMS and LCMS/MS and their applications? which type of compounds are analysis by lcms?

2707


What is the difference between purge septum flow and column flow in gas chromatography?

1196


Why sodium hydroxide used for maintain pH of phosphate buffer

1382


What is aggregate and fragments in SEC?

1133


How to check hplc detecter sensitivity?

669


Why use only methanol,used determinationof moisture content not use other solvents

327


Explain the relations between number of carbon atoms in alkanes and retention time ?

1131


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

1759