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 1195

What is the pilot-plant in pharma sector.

Dr Reddys,

1 977

What is blank titration of potentiometrically.

2 7367




process of Diclofenac sodium,IP.

859

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

807

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

3 6361

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

Torrent Pharma,

1808

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

Granules,

1 5125




what is difference between polarity and dipolemoment

Neuland,

3 6286

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

Neuland, Glenmark,

2 6171

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

1026

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

Ranbaxy, Graviti Pharmaceuticals, APM,

1 8406

How do u differentiate primary

1 1288

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 7533

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

Aurobindo, Meghmani Organics,

4 7664


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Un-Answered Questions { Analytical Chemistry }

How to start the dissolution development for unknown tab?

287


How we can determine water content in piperazine

872


In Karl Fischer titration,What is the situation if the material tested is only soluble in water,and not soluble in the common solvents used such as methanol ?? [e.g. Iron III Hydroxide polymaltose]

1474


Principle of single pan analytical balance

3629


Which type of column should i use to check the purity of high molecular weight protein using HPLC reverse phase column chromatography? Hi everyone. I wanna to check the purity of high molecular weight protein (collagen) with MW of ~130 kDa using a HPLC. I know C18

636






What is control room temperature and which guide line says?

330


why should we perform dissolution PVT calibration only by UV spectrometer, not by HPLC ?

336


if you have given a blank water how you analyse by general analytical techniques?

700


Did anybody have method for acetyl cysteine effervescnce tablet

877


In performance Check of GC Why Hexadecane Peak is Considered 

1752




1027


what is the importence and role of LCMS and LCMS/MS and their applications? which type of compounds are analysis by lcms?

2277


I have compare C2H2-air and C2H2-N2O flame AAS on determination calcium. Both use same range of std to plot calibration curve. (2-6ppm) When i measure the sample with phosphate, KCl and LaCl, C2H2-N2O flame give false positive result, around 0.5ppm. When i measure the sample with phosphste, KCl and EDTA. C2H2-N2O flame also give 0.5ppm false positive. But both above mentioned sample would not give false positive when measured by C2H2-air flame. What is the reason?

2032


what is separation techniques.

1321


What is gelatinization?

367