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Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

In dissolution test s1 stage we are getting one bowl 40 % out of 6 bowls what is the root cause you find and how proceed next step? ( Q is 80%)

Reddy Labs,

3 2212

why we inject sample TWICE in ASSAY by HPLC analysis but in RS once?

Aurobindo, DRL, Neuland,

4 8166

What id the resolution factor

1 2764

what is a placebo peak

GMP Pharma, Optimus,

2 4084

what is the effect of injection volume calculate flow rate in perkin elmer headspace? (ccm parameter in HS)

1 1441

How can we calculates the solubility of the drug in different medias by injecting in to hplc????(solubility studies)

Super Pharmaceuticals,

2 2813

What is the use of Holmium (III) Oxide???

Finar Chemicals,

1 3639

India is. Under which zone as per QF1.?

Acebright, Aurobindo, Gland Pharma,

4 11219

how to calculate the Step and ripple accuracy for pump gradient test for UPLC?

Wockhardt,

1 6149

why salicylic acid not use for dissolution.

Cipla, Indo Baijin Chemicals,

1 3748

Which water can use Hplc analysis

BioGenomics, Dr Reddys, Reddy Labs,

9 8222

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

1025

what is the analytical procedure for COD and BoD

Dai-Ichi,

1 3117

Why pH lies between 0 to 14 only

PI Industries, Unimark Remedies,

4 8082

In chromatograpbic purity 90% is there, in assay 70% is there. How will you prove remaining 30%.

Dr Reddys,

3 5900


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Un-Answered Questions { Analytical Chemistry }

can i use hplc detector to uplc and why?

1332


For titration in anhydrous media with perchloric acide, if lack of titrator, Which indicator is been used for replacement. How calculate pH of test solution to choose suitable indicator?

1238


Why sodium hydroxide used for maintain pH of phosphate buffer

1302


what is the extinction coefficient for Indomethacin or at 319nm wave length.

2920


what is the structure of DOWEX-50

4296






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,

1440


why equlirium conatant of water have 14 value

1230


What is the purpose of octyl silane columns?

3209


How to calculate coreletion coefficient

561


Why we used in n-butyl acetate water content terminology while in ethyl acetate we used moisture content terminology?

902


How we can determine water content in piperazine

1256


how to select short coloum and long coloumn for new molecule

1359


What is the difference between purge septum flow and column flow in gas chromatography?

1112


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

7239


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

1464