Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

how to calibrate hplc & gc

Cipla,

3089

Explain in detail what are the procedure and calculations involved for accuracy (%Recovery)in method validation?

Vimta Labs,

1 4373

WHAT IS DIFFERENCE BETWEEN RRT AND RRF IN HPLC

Cadila,

2 39367




what is mean by Q in S1 and S2

Micro Labs,

3 7274

what is the difference between mcg and ppm?

5 19674

WHAT IS THE DIFFERENT BETWEEN PURITY, POTENCY AND ASSAY

Hetero, Glochem,

5 42381

How we can perform Linearity study for validation by HPLC with very low conc of sample

1 5020

principle of FTIR

Biocon, Macleods,

2 13060




what is separation techniques.

Glenmark,

1 1323

what is the difference b/w repeatability nd reproducibility ?

Aptuit Laurus,

1 7352

why using factor 1.00639 in burette calibration of kf

Cipla,

1 6003

what type of questions asked on analytical balance and also give answers................all pharma companies?

Sun Pharma,

5968

Why KBr is used in FTIR ?

6 10020

How to study genotoxicity of impurities in API?

NCL,

2 2977

What is the difference between chiral cel OD-H & OD-RH ?

Aptuit Laurus,

3 7504


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Un-Answered Questions { Analytical Chemistry }

AT WHAT CONDITIONS WILL YOU ANALYSE A SAMPLE,WHICH ARE PRESERVED AT OTHER THAN THE AMBIENT CONDITIONS?(ie COLD STORAGE SAMPLES BELOW 20* CENTIGRADE?

828


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?

1843


when we talk about change in entropy we consider total entropy means of surround +entropy of system but when we talk about change in Gibss free energy we consider entropy of system.explain with reason.

760


What are usp limits for theoritical plats,resoution,tailing factor,peak to valley ratio

283


In performance Check of GC Why Hexadecane Peak is Considered 

1752






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

1406


In Dissolution Test why limit is define Q+5% what is the role of +5%.

1419


is it necessary to do HPLC calibration at wavelength 315nm if we are doing analysis at this wavelangth

554


why does used dry caffien in HPLC calibration?

564


What is the exact reason to use THF and IPA in buffers of Reverse phase HPLC as a solvent?

2472


What is stray light in uv what are units for stray light

221


what are the standard methods for HPLC?

1483


What is the purpose of octyl silane columns?

2602


Please tell me about the pH of Polycaboxylic ether is it in the 5-6 range ever or more than 6

1295


what is the origin to prepare standard operating procedure

947