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.

1103

What is the pilot-plant in pharma sector.

Dr Reddys,

885

What is blank titration of potentiometrically.

2 7122




process of Diclofenac sodium,IP.

798

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

752

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

3 6082

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

Torrent Pharma,

1748

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

Granules,

1 4932




what is difference between polarity and dipolemoment

Neuland,

3 6045

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

Neuland, Glenmark,

2 5995

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

940

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

Ranbaxy, Graviti Pharmaceuticals, APM,

1 8185

How do u differentiate primary

1 1209

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 7260

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

Aurobindo, Meghmani Organics,

4 7425


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Un-Answered Questions { Analytical Chemistry }

iam usig ph buffers merk. manually how to prepare ?

912


WHAT IS THE CRITERIA FOR SELECTION OF TIME OF DISSOLUTION AND THE MEDIUM OF DISSOLUTION?

1292


In HPLC calibration, caffeine is used as primary standard for wave length calibration due to caffeine is having dual maxima at 273 & 205 nm and one minima at 245 nm. Any body can give reference of these details from any pharmacopeia (with chapter no.) or any other authentic guideline?

226


How to estimate potassium?

121


what is separation techniques.

1269






Ratio of Water and Acetonitrile(diluent) is not recommended to use in cleaning method validation,why?

1585


when we talk about change in entropy we consider total entropy means of surround +entropy of system but when we talk about change in Gibss free energy we consider entropy of system.explain with reason.

712


Why do we use KMnO4 in the test of control of obsorbance ? and why do we take specific quantity i.e 57-63mg?

1190


What is the calibration of uv process and preparation

594


sop of a uv visible spectrophotometer double beam elico model

4029


We use Potassium Dichromate solution for the calibration of UV-Visible Spectrophotometer in UV region. My question is to calibrate visible region which solution could be used in photometric accuracy

13


cefoperozone and sulbactam inj. hplc test method

1203


Why potassium dichromate is used in calibration of uv?

180


Did anybody have method for acetyl cysteine effervescnce tablet

820


why does used dry caffien in HPLC calibration?

500