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 7770

what is the cleaning validation?

BioPlus,

1 6949

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

AVT, Hetero,

3 7518




What is polymorphism?which type of compounds exhibits polymorphism?

Torrent Pharma,

2 6411

what is the basic principle of conductivity meter

Hetero,

4 22682

Column selection in HPLC method development?

1 9081

How to prepare ppm solution of Nacl form its salt?

5 51742

what is mean by assay?

6 15151




why we are doing seal wash and needle wash?

2 10630

which functional group we can detect in IR?

3 8130

what is mean by UOD?

2 6743

what is mean by content uniformity?

5 6060

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

3 6990

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

1 5890

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

Strides,

4 7106


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Un-Answered Questions { Analytical Chemistry }

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

807


What is FFA, PV, and PAV value in oil.

554




1027


How to choose concentration of LOQ solutions for RS analysis? Example.

732


AT WHAT CONDITIONS WILL YOU ANALYSE A SAMPLE,WHICH ARE PRESERVED AT OTHER THAN THE AMBIENT CONDITIONS?(ie COLD STORAGE SAMPLES BELOW 20* CENTIGRADE?

828






please explian me about area normalisation method,diluted standard method,impurity vs impurity and which one has to be selected in method development

308


What is gelatinization?

368


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

5387


WHAT IS THE USE OF STARTER ?????????

1071


is it necessary to do HPLC calibration at wavelength 315nm if we are doing analysis at this wavelangth

554


How do we quantify crystaline and amarpous forms by using (NMR, XRD)spectroscopic techniques? Which any others instruments are useful for this quantification? explain

1135


What is viod volume and peak purity in HPLC?

1329


what is definition of validation? which components are followed give detail?

883


How we performed the force degradation for drug substance, is any specific guideline is available for each parameter(Acidic, basic, oxidation,heat)? what conditions you mentained for above parameters.

1002


Why to use propyl paraben in HPLC gradient calibration

448