Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

What is the diference between residual solvents and organic volatile matter

RA Chem Pharma,

626

WHY given much noise PDA dector then VWD Dector

610

How to decide the standard concentration for related substances hplc method

1 865




Why we have to use KBr pellet technology ?

1 797

Why dissolution test performed on six jar?

Mylan,

1 1375

How to determine retention time in Chromatography

Mylan,

2 2409

effect of Ph during analytical run ?

Lambda Therapeutic Research,

1 625

USP methodology, EP methodology, IP methodology, among three if possible to use one methodology for qualify working standard to use USP, EP, IP ? Please explain...

Srini Pharmaceuticals,

505




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

Aarti Drugs,

522

Which is the highly polar and highly non polar column in HPLC?

742

What is the difference between qualitative and quantitative analysis (hplc)

1 1016

what is the difference between potentiometric titration and karl fischer titration?

954

How NMR spectra can be calibrated in presence or absence of TMS?

1 814

What is Band broading effect explain

Dr Reddys,

500

we are performed SOR for a particular product the limit is -6 to -10.We face particular bathes it is not meeting the specification.we performed diffrent instrument diffrent analyst we are getting diffrent diffrent results.solvent is dimethyl sulfoxide what could be the reasion

Cipla,

434


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Un-Answered Questions { Analytical Chemistry }

function of detecter in hplc ,gc and spectroscopy? function of carrier gas in gc?

1162


Can we interpret accuracy from linearity in method validation?

700


WHY given much noise PDA dector then VWD Dector

610


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

1449


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.

736






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

176


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?

863


what parameters we will consider while developing a HPLC method and how we confirm our HPLC method is valid?

2147


We use Potassium Dichromate solution for the calibration of UV-Visible Spectrophotometer in UV region. My question is to calibrate visible region which solution could be used in photometric accuracy

108


why equlirium conatant of water have 14 value

873


What is third generation HPLC Columns?

639


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

5715


Why to use propyl paraben in HPLC gradient calibration

297


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

1375


What is the calibration of uv process and preparation

621