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 11469

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?


1 4503

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

Hapten Healthcare, Pharmaceutical,

6 30890

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

5 10045

for which type of applications gas chromatography is used?

2 5540

for which type of applications gas chromatography is used?

2 5499

for which type of applications gas chromatography is used?

Cipla, Flamingo Pharmaceuticals,

5 9702

wat is reverse phase in hplc

2 7718

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 10789

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 17831

how to Calibrate FID IN GC

1 6532

what is assay in hplc

3 10315

how calibrate the hplc detector

Cipla, Shraddha Analytical Services,

2 9435

why we use deturium lamp in uv spctrophotometer other than lamps

1 9101

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

2 6191

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Un-Answered Questions { Analytical Chemistry }

How you develop a method in HPLC?


Why irmoisture balance is used for corrugated box moisture testing


How to calculate coreletion coefficient


What is the requirement for brazil in the analytical method vslidation comparr to ich?


using gradient pressure in gas chromatography are not ?using gradient pressure why


How to start the dissolution development for unknown tab?


Home heating oil or furnace oil what is made from? Can (base oil plus diesel/kerosen) = home heating oil?


If inhouse hplc related substance method is completly diffrent from Usp for finished pro─Ćuct with diffrent impurities then how require to prove method equivalecy?


what is mean by nitrosamine impurities?


sop of a uv visible spectrophotometer double beam elico model


what is mean by 40 in the dissolution basket mesh size?


in which situation ion pair agent require to use?


What is dose dumping? why require to do?


please explain about aluminium hydroxide assay


What is a difference between potency and purity?