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Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

What is mean by peak tailing in case of GC?

 5 14035

why we are taking 85 ml of concentrated HCl to prepare 1N Solution

SG Phyto Pharma,

4 116019

What is diffrence between residue on ignition and sulphated ash?

Aurobindo, Cadila, Dr Reddys, Mylan, Panas Pharmaceuticals, Piramal Healthcare, Remidex, Zydus Cadila,

37 191884

how can standardized of HCl of 0.1 N

 7 46403

What is the difference b/w OVI Solvents and Residual Solvents in case of Gas Chromatogaphy and What is its Detection Limit?

Jubilant Organosys, Suven Life Sciences,

8 36269

what is the diffrence between absorbance and absorption in the beer,s lamber formula ?

 2 10047

one gram of which below elements has the most atoms in its? a) H b) D C)T D) He

4 5945

0.1 atom gram of the unknown element( X)reacts with 2.4 gram of O2 to produce the oxid product . can you tell us, what is the oxid formula ? a) XO b)X2O3 c)XO2 D) X2O4

Ajanta,

1 3364

Why we use Uracil for HPLC calibration in Detector wave ength accuracy test?

 5 24419

k.f principle in finding out moisture content

 1 12619

What is difference btw UV detector & RID detector

 4 17797

What's the importance of these procedures?

 1 4304

How precise should be the linearity in HPLC method validation?

Glenmark,

3 10236

what should be the precision during technology transfer?

Glenmark,

3 7919

why we use vanillin in melting range calibration

3 13309

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Un-Answered Questions { Analytical Chemistry }

pharma industries oriented

1679

My question about gas chromatography sulfur chemiluminsecence detector. I test unknown sample gas by GC-SCD (calibrated ) and the result of *H2S is 279 PPM , *but when I test the same sample with the GC-TCD (calibrated ) the value of *H2S is 2500 PPM . I'd like to inform you that both GCs are calibrated and have very good operation conditions with stable parameters . the question is if the sample gas with higher H2S over detection limits of SCD detector (1000 ppm). why the result it 279 ppm Best regards

1101

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

2405

Tell me something about Vitamin A test method by HPLC

2197

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

2880




Tell me about analytical method validation in QC

5528

in sampling of raw material which side is pasted sampled labels

1242

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

1752

Why six unit used for precision?

794

How they found 1mL of K.F reagent is equivalent to 5mg of water and if we change the composition of K.F reagent, is it can neutralize more amount of water?

1293

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

9421

If suppose 10 methods of dissolution given in pharmacopoeial for single content product then which method out of 10? or all 10 require to follow?

522

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

2263

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

1010

how you fix the limits of impurities?

367

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