Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

What is the defination of Bulk density?

Dr Reddys,

4 10486

What is the Defination of Tapdensity ?

Dr Reddys, R L Fine Chem,

4 8401

What is the formula for Tapdensity /

Dr Reddys, GR Intrachem,

6 11239




Why use in sodium salicylate in uv lamps calibration

Reddy Labs, Auctus Pharma,

1 4021

Why using Holmium oxide in UV calibration

Orchid, Dr Reddys, Matrix, Nakoda Chemicals,

8 31140

Why we are performing wavelength accuracy at lower and higher wavelengths in HPLC calibration

3 8412

How to fix the concentration for RS by HPLC

Reddy Labs, Intas,

8 27679

what is the definition of Precision.

Cipla,

4 6715




what is the identification test of volatile substance? what is volatile compound?

895

what is differance between volatile and non volatile compound expalin by exaple

2 11816

Why do we use 500ppb sucrose and 500ppb 1,4 benzoquinone in TOC calibration?

1 1576

In the test for control of absorbance in UV calibration why do we use only potassium dichromate and what is purpose of taking a specified amount of 57.0-63.0mg?

Cipla, FDC, Aurobindo,

8 44926

In the test for control of absorbance in UV calibration why do we use only potassium dichromate and what is purpose of taking a specified amount of 57.0-63.0mg?

Reddy Labs,

1 6802

Why do we use 500ppb sucrose and 500ppb 1,4 benzoquinone in TOC calibration?

5 14269

what is the use of performing tapped density in pharmaceutical industry

1 7566


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Un-Answered Questions { Analytical Chemistry }

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

929


Colorimtry

143


I have compare C2H2-air and C2H2-N2O flame AAS on determination calcium. Both use same range of std to plot calibration curve. (2-6ppm) When i measure the sample with phosphate, KCl and LaCl, C2H2-N2O flame give false positive result, around 0.5ppm. When i measure the sample with phosphste, KCl and EDTA. C2H2-N2O flame also give 0.5ppm false positive. But both above mentioned sample would not give false positive when measured by C2H2-air flame. What is the reason?

1942


What is method validation in quality control

2299


what is difference between zero air gas and o2 gas

5454






Which products will produce when acetic anhydride reacts with Ter-butanol, Sec-butanol, Iso butanol, Dimethylamine etc.

1335


why we are using hexane in calibration of number of drop per mL

157


mahagenco syllabus for the post of chemist

4819


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

1234


can we use the same detector in HPLC as well GC and what could be the differences we can find in the final chromato graph in any aspects?

822


why we use sodium salicylate in uv light calibration at TLC chamber

4683


how to get accurate result for Residue on evaporation in purified water

192


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

1346


why disodium tartarate used in karl-fischer instrument ?.

607


WHAT IS DIFFERENCE B/W MALTINGRANG/DSC

1068