Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

perchloric acid&glacal acetic acid both are acids but reaction is complete in volumetric titrations.how?

1 7881

what is the cleaning validation?

BioPlus,

1 7004

acetic acid is weak acid & perchloric acid is strong acid.but how perchloric acid is soluble in acetic acid

AVT, Hetero,

3 7586




What is polymorphism?which type of compounds exhibits polymorphism?

Torrent Pharma,

2 6453

what is the basic principle of conductivity meter

Hetero,

4 22826

Column selection in HPLC method development?

1 9162

How to prepare ppm solution of Nacl form its salt?

5 52275

what is mean by assay?

6 15321




why we are doing seal wash and needle wash?

2 10784

which functional group we can detect in IR?

3 8201

what is mean by UOD?

2 6819

what is mean by content uniformity?

5 6144

today i am doing calibration of HPLC. when i inject the blank it was going on -ve.(bleow then zero) why?

3 7038

what are the sources in ELSD,PDA, RI and UV Detectors?

1 5933

in karl fischer reagent which solvent is used for dissolving iodine sulphur dioxide and imidazole

Strides,

4 7170


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Un-Answered Questions { Analytical Chemistry }

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?

310


How to compare XRD graphs against standard and carry polymorpism study of API's by powder XRD method?

2563


why we use Dichlorobenzene.nitrobezine.t-butyldi sulhate.for calibration of gc Head space

940


what is the principle of UV Vis spectroscopy, AAS, ICP OES,ICPAES, ICP-MS and FTIR

6060


how to get accurate result for Residue on evaporation in purified water

280






What is the difference between Discriminating media and DPDM(Dissolution Profile with Different Media)

5332


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

821


mahagenco syllabus for the post of chemist

4904


what is the procedure for cleaning of lenses of hatr accesory of ftir instrument?

1061


sop of a uv visible spectrophotometer double beam elico model

4156


What is intact assay method development.....?

1119


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

8457


why 6 tablets use for dissolution

1875


how to calibrate hplc & gc

3105


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

1936