Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

how can delete the impurity in 1-(2:6 dichloro phenyl)-2-indolenone.and desolving the impurity in which solvent but does not desolve product in solvent.

1 1154

What is the pilot-plant in pharma sector.

Dr Reddys,

926

What is blank titration of potentiometrically.

2 7234




process of Diclofenac sodium,IP.

831

why we are using benzene, anyline in acetic anhdride assay titration method?

774

which solution used for detecting factor of k.f.titroter except water

3 6210

in dissolution why pool sample needed? in which type of drug pool sample need?

Torrent Pharma,

1778

void volume is depending on column or not? if yes how will you depend?

Granules,

1 5030




what is difference between polarity and dipolemoment

Neuland,

3 6149

in determination of(acetone) moister content we are using methanol replaced by pyredine.what hapend in that reaction.

Neuland, Glenmark,

2 6079

what is impurity profile. how to interpret this impurity profile to a drug product or drug substance.

980

What is the difference between spectro meter and spectro photo meter?

Ranbaxy, Graviti Pharmaceuticals, APM,

1 8287

How do u differentiate primary

1 1245

WHEN AN UN KNOWN SAMPLE IS GIVEN TO U,HOW WILL U START THE ANALYSIS(ie FIRST WHICH TEST TO BE DONE,NEXT,THEN NEXT),HOW WILL U DECIDE WHICH TYPE OF ANALYSIS TO BE DONE FOR IT?

Aurobindo,

2 7391

WILL YOU DRY DST BEFORE FACTOR DETERMINATION BY USING KARL FISHER TITRATOR

Aurobindo, Meghmani Organics,

4 7526


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Un-Answered Questions { Analytical Chemistry }

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

665


How to determine water content of bis tetrazole amine mono ammonium salt

1855


Basic principle of ESI?

788


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

1782


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

5304






How can we calculate offset value pH measurment

150


how to select short coloum and long coloumn for new molecule

953


what is third integration

660


Which products will produce when acetic anhydride reacts with Ter-butanol, Sec-butanol, Iso butanol, Dimethylamine etc.

1376


4. Describe the operation of the Craig apparatus. Chapter.3 Equilibrium Processes in Separations

1223


What are the primary considerations in extractables and Leachables ?

956


In HPLC (Waters) software Empower1,2 &3 what is the updation for each version

1343


WHY given much noise PDA dector then VWD Dector

610


what is %labelled amount in content uniformity of dosage unit and its calculation?

3514


In Dissolution Test why limit is define Q+5% what is the role of +5%.

1341