Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

How to calculate the signal to noise ratio.

Rakshit Drugs,

1 4456

Why pH range is 1-14 nt more than 14???

IPCA, Lincoln Pharmaceuticals,

3 4916

Weight balance variation limit during analysis

Amneal Pharmaceuticals,

7 4136

How to calculate lamp energy in hplc?


Difference between related substances & impurities


1 5883

Polarized meter calibration, 1. Method name? 2. Which solution use? 3.why?

1 1694

Basic principle of ESI?

Cipla, GVK,


What is the meaning of Base deactivated vials

Sun Pharma,


What is definition of RRT and what is the difference between RT and RRT in HPLC

1 2881

What is the definition of RRF

2 3571

In GC Why does retention time decrease when temperature increases? Also how does a change in temperature effect selectivity?

Gland Pharma,

1 1148

why we use 0.1% acetone in gradient calibration of HPLC?

FDC, Dr Reddys, Cipla,

2 5529

What is difference between assay by Hplc and uv

Aizant, Fredun Pharmaceuticals, Hetero, Marksans Pharma,

2 5151

why we use actone for Gpv test in hplc calibration

1 4899

How to standardization of 1N H2SO4?

GNFC, Macleods,

1 3919

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Un-Answered Questions { Analytical Chemistry }

What is the diference between residual solvents and organic volatile matter


what is third integration


what is difference between UV - VISIBLE MODEL NO like 1600,1601,1700 etc ? plz explain me


A ha tc is actual defination of retention time?


What is the difference between BD


why are measure gas flow " ml " in Gas chromatography


What is Band broading effect explain


can i use hplc detector to uplc and why?


1)What's the meaning of Absorption,give a example. 2)What's the meaning of Adsorption,give a example. 2)what is the difference between Absorption and Adsorption.


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


what is weight veriation in pharma industry ? plz explain me


Can we interpret accuracy from linearity in method validation?


If we do accuracy at same concentration at which linearity planned,what is the need to do linearity separately?


how a particular wavelength can be different for a particular compund while analysing by uv and by HPLC.


While performing TOC sst analysis Zero shift disabled & sample analysis zero shift enabled why?