Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

What is the diference between residual solvents and organic volatile matter

RA Chem Pharma,

764

WHY given much noise PDA dector then VWD Dector

745

How to decide the standard concentration for related substances hplc method

1 1235




Why we have to use KBr pellet technology ?

1 1126

Why dissolution test performed on six jar?

Mylan,

1 1795

How to determine retention time in Chromatography

Mylan,

2 2838

effect of Ph during analytical run ?

Lambda Therapeutic Research,

1 928

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,

649




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

Aarti Drugs,

652

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

885

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

1 1485

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

1291

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

1 995

What is Band broading effect explain

Dr Reddys,

646

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,

542


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Un-Answered Questions { Analytical Chemistry }

IS THERE ANY EQUIPMENT TO CHECK AND CALCULATE THE POLARITY OF A LIQUID?

1284


Ratio of Water and Acetonitrile(diluent) is not recommended to use in cleaning method validation,why?

1737


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

1031


How you develop a method in HPLC?

1358


How can the GC or HPLC method is selected to determine the impurity profile in drug product?

5548






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...

649


why we use Dichlorobenzene.nitrobezine.t-butyldi sulhate.for calibration of gc Head space

1013


WHAT IS THE USE OF STARTER ?????????

1154


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

322


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

2602


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

1276


What is the difference between spectro meter and spectro photo meter?

8680


Difference between hlaf and rlaf

774


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

1133


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

300