Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

How to calculate the signal to noise ratio.

Rakshit Drugs,

1 4806

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

IPCA, Lincoln Pharmaceuticals,

3 5556

Weight balance variation limit during analysis

Amneal Pharmaceuticals,

7 4679

How to calculate lamp energy in hplc?


Difference between related substances & impurities


1 7739

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

1 1865

Basic principle of ESI?

Cipla, GVK,


What is the meaning of Base deactivated vials

Sun Pharma,

1 1328

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

1 3484

What is the definition of RRF

2 3880

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

Gland Pharma,

1 1518

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

FDC, Dr Reddys, Cipla,

2 6475

What is difference between assay by Hplc and uv

Aizant, Fredun Pharmaceuticals, Hetero, Marksans Pharma,

2 5973

why we use actone for Gpv test in hplc calibration

1 5806

How to standardization of 1N H2SO4?

GNFC, Macleods,

1 4614

Post New Analytical Chemistry Questions

Un-Answered Questions { Analytical Chemistry }

As per ICH related substances stability trend limit from initial to shelf life


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


Qc interview questions


How to calculate coreletion coefficient


How to do regeneration of Metacarb Pb plus column?


what is procedure of actual procedure for registration of drug?


Which type of column should i use to check the purity of high molecular weight protein using HPLC reverse phase column chromatography? Hi everyone. I wanna to check the purity of high molecular weight protein (collagen) with MW of ~130 kDa using a HPLC. I know C18


what is the different in Total ash, sulphated ash, acid insoluble ash, alcoholic or non alcoholic ash?


What is the principle of HPLC, GC, LCMS, GCMS,LC QQQ, GC QQQ, LC Q TOF and GC Q TOF. What are the applications and Specificity?


Many times I don't got a caffeine peak in calibration of hplc using guard column ❓


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


why we use a particular hplc column for a particular compound give reasons?please


for heavy metal test lead used in which form pure form or any other form for preparation of lead standard sol




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?