Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

why phepolphthalene giving pink color when we titrate against to NaOH Solution ,giving colrless titrating aginsiting with acids?

Vimta Labs, Graviti Pharmaceuticals,

2 2420

why ph electrode is storing in KCL solution?Why the pH max is 14.0?

Cadila, Vimta Labs,

5 13591

Why Na lamp is used in polarimeter?

Vimta Labs,

5 10933




why is salt andv ice used in liquifyiny SO2

Graviti Pharmaceuticals,

1 2833

What is pooled sample in Dissolution

Lupin, Graviti Pharmaceuticals,

2 15182

cefoperozone and sulbactam inj. hplc test method

Graviti Pharmaceuticals,

1240

how peak can be sharp in hplc when it is come flat

Graviti Pharmaceuticals,

6 13270

what is Fourier Transform

Graviti Pharmaceuticals,

3 5992




What is descriminatory disolution medium ?

Cipla, Graviti Pharmaceuticals,

3 6273

what is the difference between loss on drying in ordinary oven technique and vacuum oven technique

Ranbaxy, Divis Laboratories,

4 10993

what is the difference between the Purity and Potency of drug substance

Divis Laboratories, Graviti Pharmaceuticals,

1 8565

what is the difference between LOSS ON DRYING IN ORDINARY OVEN TECHNIQUE AND VACUUM OVEN TECHNIQUE

6 17599

why we are using only lead standard solution for Heavy metals test? what is the purpose of this?

Divis Laboratories,

4 9225

what is the difference between the ordinary loss on drying technique and vacuum oven technique?

Divis Laboratories,

1 6082

what is the difference between gc& hplc. why we r not calculating purity by gc for final products

Biocon, Cipla,

5 11832


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Un-Answered Questions { Analytical Chemistry }

could negative ions be produced by bombardment process in mass spectrometry?

165


why we use sodium salicylate in uv light calibration at TLC chamber

4814


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

1341


how to selecet an exact coloumn for an new molecule development by hplc how to select exact salt as buffer for new molecule development by hplc what is the the process to select the mode of saparation of compoundes by hplc what is the use of ph of buffer what is use of buffer,ph,organic phase,ans methods how the molecules get saparated in coloumn,

1108


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

539






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.

989


A ha tc is actual defination of retention time?

193


from where i get mortar pastle for glass bottle crush? it's required for testing of it?

877


Difference between hlaf and rlaf

659


Why we check moisture,ash & AIA in product

438


How to calculation of residual solvent methanol (3000 ppm) standard solution, and how many quantity used of test sample

978


what is procedure of actual procedure for registration of drug?

592


What is the meaning of Base deactivated vials

975


why we are using hexane in calibration of number of drop per mL

198


Describe your field experience sample type collected,sample techniques,field measurements taken and equipment used?

1427