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Analytical Chemistry Interview Questions
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Difference between uv detector nd RI DETECTOR? wt s the difference between OVI Solvents nd residual solvents incase of GAS CHROMATOGRAPHY? nd wt s its detection limit?

3 11354

on what basis SOP's can be changed? IF mobile phase ratio is 70:30 to how much % can we change the ratio in HPLC process

Cipla, Ranbaxy,

7 11439

Why caffeine as a reference standard used for calibration of HPLC?

Orchid, Gangwal Chemicals,

11 43568



What is the composition of K.F

IPQA,

6 34533

What should be the precision for HPLC during technology transfer?

 3 6470

how do start hplc method development? how much sample required for developing the method development?

BMS, Cipla, Sun Pharma, Indoco Remedies,

3 41964

Wt s the use of linearity in HPLC method validation

 4 11679

which pharmacopeoia mentions that caffiene is used as a standard for HPLC calibration? which other standardscan be used for the same?

Hetero, Mylan,

1 5722



Why will a solution of aspirin without acid or basic hydrolysis give yellow colour with a solution of Ferric chloride?

 1 3740

Why do we use 0.005M h2so4 solution for preparation of k2cr2o7 solution for UV calibration?

Medreich, Mylan, Jubilant,

3 19904

In HPLC what is Single point threshold, peak purity index and minimum peak purity index? what should be consider for pure peak.

 3 22658

why the sucrose used in calibration of polarimeter

Neuland,

5 11426

what r the parts calibrated in gc

Reddy Labs, ELBS,

21 22217

acceptance criteria for ph meter, hplc detector,pump,injector,oven when we calibrate.

 3 19223

is there any material other than caffene to calibrate hplc detector

Biocon,

12 18041

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Un-Answered Questions { Analytical Chemistry }

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

626

Why sodium hydroxide used for maintain pH of phosphate buffer

1003

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

267

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

1138

What is column in chromatography?

863




about method developement in hplc

436

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

7237

WHAT IS DIFFERENCE B/W MALTINGRANG/DSC

1223

Tell me something about Vitamin A test method by HPLC

1404

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

1239

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

1837

what is the importance of peak purity in HPLC and how we can calculate through manul(not software)?

3149

How do we quantify crystaline and amarpous forms by using (NMR, XRD)spectroscopic techniques? Which any others instruments are useful for this quantification? explain

1211

what type of question will ask in the interview of lab chemist.

2161

How can I develope method of dissolution by HPLC OR UV

1021

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