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Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

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 12755

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 12856

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

Gangwal Chemicals, Orchid,

11 47141

What is the composition of K.F


6 37062

What should be the precision for HPLC during technology transfer?

3 7185

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

BMS, Cipla, Indoco Remedies, Sun Pharma,

3 46276

Wt s the use of linearity in HPLC method validation

4 13053

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

Hetero, Mylan,

1 6705

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

1 4114

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

Jubilant, Medreich, Mylan,

3 21630

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

3 25015

why the sucrose used in calibration of polarimeter


5 12619

what r the parts calibrated in gc

ELBS, Reddy Labs,

21 25873

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

3 21005

is there any material other than caffene to calibrate hplc detector


13 20582

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Un-Answered Questions { Analytical Chemistry }

What is the diference between residual solvents and organic volatile matter


How to determine the EDTA content by potentiometry titration in Ceftriaxine sodium


why should we perform dissolution PVT calibration only by UV spectrometer, not by HPLC ?


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


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


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


which one is better separation in high pressure liquide chromatogram orlowpressure chromato gram in hplc


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


What is importance of pH in the Heavy metal test and How it effect on the test results?


How do we fix the sample concentaryion in hplc method development?


How to know the estimated LOQ concentration in ppm


please explian me about area normalisation method,diluted standard method,impurity vs impurity and which one has to be selected in method development



why lactose has less charges when packed in steel containers when compared with packing of lactose in polyamide material?


What is the calibration of uv process and preparation