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 11729

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 4620

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

Hapten Healthcare, Pharmaceutical,

6 31309

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

5 10324

for which type of applications gas chromatography is used?

2 5714

for which type of applications gas chromatography is used?

2 5586

for which type of applications gas chromatography is used?

Cipla, Flamingo Pharmaceuticals,

5 9881

wat is reverse phase in hplc

2 7849

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 10974

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 18128

how to Calibrate FID IN GC

1 6655

what is assay in hplc

3 10514

how calibrate the hplc detector

Cipla, Shraddha Analytical Services,

2 9587

why we use deturium lamp in uv spctrophotometer other than lamps

1 9213

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

2 6352


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Un-Answered Questions { Analytical Chemistry }

on the basis of bcs class how to proceed the solubility?

269


If vendor having more imp than monograph then how to proceed? and how to set spec?

326


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

1747


in which situation require to use paddle and basket?

277


In GC calibration,what is the procedure to calibrate the TCD (thermal counductivity detector)suggest ?

2697






for which product require to do content uniformity? what is limit of cu?

300


In Assy by potentio metry titration method how select MET U ,DET U, SET U,

1300


How to calculate coreletion coefficient

1127


In the isomers,enantiomers give the only physical properties present such that no chemical properties present.

1765


why cone formation during dissolution?

304


for heavy metal test lead used in which form pure form or any other form for preparation of lead standard sol

5278


we can use expired sample for validation and analyst qualification?

289


WHICH STANDARD WE USE IN SILICA ANALYSIS IN SILICA-GEL METHOD FOR SOLID SAMPLE

1607


what is the disso medium for tropsiun chloride

1789


What should be the level/ Percentage of Arsenic in Arsenic free zinc.

1748