Analytical Chemistry Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Analytical Chemistry Interview Questions

Questions Answers Views Company eMail

When i inject amines and acid on HPLC then which peak will elut first?

Sun Pharma,

4 13463

In pharmacopeal solibility parameter of a material, is et essential to test all paramete? If 70-75% parameter passes can we assess that the material is satisfactory or not?

Aurobindo,

1 5345

Why triethylamine and o-phosphoric acid used while setting pH of mobile phase during HPLC Analysis?

Hapten Healthcare, Pharmaceutical,

6 33659

why RID detector is used for selective materials like Mannitol, Hydroxyethyl Starch and Sorbitol?

5 12510

for which type of applications gas chromatography is used?

2 6695

for which type of applications gas chromatography is used?

2 6483

for which type of applications gas chromatography is used?

Cipla, Flamingo Pharmaceuticals,

5 11425

wat is reverse phase in hplc

2 8859

For Dissolution test why we are Performing 6 Bowls why not more.any were mentioned or in what basis we are performing? --------Veerabhadrarao.M

Lee Pharma, Micro Labs,

2 12173

In Number of Theoretical Plates (N) = 16 (tr/w)2. where tr: retention time, and W: peak width. My Question is here in formula what is 16.Can u explain briefly? ---Veerabhadrarao.M

Micro Labs, Richter Themis, Sun Pharma,

3 19488

how to Calibrate FID IN GC

1 7389

what is assay in hplc

3 11756

how calibrate the hplc detector

Cipla, Shraddha Analytical Services,

2 10663

why we use deturium lamp in uv spctrophotometer other than lamps

1 9987

A new drug substance found fail to meet specification for an unknown Impurity during stability study(Specific change),how would further proceed?

2 7367

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Un-Answered Questions { Analytical Chemistry }

What is viod volume and peak purity in HPLC?

2835

2284

how to calibrate hplc & gc

4478

What is the difference between purge septum flow and column flow in gas chromatography?

2520

which batch require to use for analytical method validation?

763

why are measure gas flow " ml " in Gas chromatography

1622

how can give the expiry period and restadardisation of volumetric solution

2556

Why only hydroxy naphthol blue indicator is used for standardisation of 0.05M EDTA solution instead of solochrome Black T or Euriochrome Black T indicator which is used for all sample analysis with 0.05M EDTA solution?

2689

How can we confirm the HPLC column is end-capped or not? Is it possible to identify by physical appearance?

3178

why we are using hexane in calibration of number of drop per mL

1696

what is lod and loq ?,why use k2cr2o7 , kcl h2so4 in uv calibration ?,why use benzophenone & caffene acetone in hplc calibration ?,what is leading peak in hplc ?why we do the calibration of limit of stry light in hplc & uv ?

3631

How doing qbd practically?

933

How would you decide dissolution medium for NCE compound of class I drug

2222

in DMF having extra impurities and in api COA also having extra imp than USP or BP product then how require to proceed?

794

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

7540

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