Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

What is mean by peak tailing in case of GC?

5 10514

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

SG Phyto Pharma,

4 101009

What is diffrence between residue on ignition and sulphated ash?

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

37 142803




how can standardized of HCl of 0.1 N

7 36610

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 28542

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

2 7799

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

4 3659

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 1822




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

5 18654

k.f principle in finding out moisture content

1 10637

What is difference btw UV detector & RID detector

4 13769

What's the importance of these procedures?

1 2937

How precise should be the linearity in HPLC method validation?

Glenmark,

3 7203

what should be the precision during technology transfer?

Glenmark,

3 5722

why we use vanillin in melting range calibration

3 9189


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Un-Answered Questions { Analytical Chemistry }

acceptance criteria for lod & loq by standard deviation of response and slope??

1131


how much mass should be there in volumetric flask while in preparation of sample for assay? 

1104


What is the main difference between ODS1 and ODS2 Hplc column.

1623


iam usig ph buffers merk. manually how to prepare ?

935


Why dissolution test is not performed in all of the products

1132






why glutent are detected in the rice cereal baby food product even manufacturer claimed that they are using rice and milk only?we have using ELISA to do the test,and rice supposed not containing any glutent,rite?We already repeat the test so many times and it still detected.just wondering where the glutent came from?

1199


what is definition of validation? which components are followed give detail?

841


What is the acceptance criteria for moisture balance when calibrated with sodium sulfate

615


what is the disso medium for tropsiun chloride

848


how to selecet an exact coloumn for an new molecule development by hplc how to select exact salt as buffer for new molecule development by hplc what is the the process to select the mode of saparation of compoundes by hplc what is the use of ph of buffer what is use of buffer,ph,organic phase,ans methods how the molecules get saparated in coloumn,

1088


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

149


What is the meaning of Base deactivated vials

957


How can I develope method of dissolution by HPLC OR UV

923


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

905


How can we calculate offset value pH measurment

148