Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

for heavy metal test lead used in which form pure form or any other form for preparation of lead standard sol

Watson Pharmaceuticals,

1 3713

we run the same sample in same method in different flow rates in HPLC,any changes in sample analysis?

2 4927

For limit test of heavy metals in BP, Method C require that the substance is ignited at a temperature not exceeding 800 °C. Why confines such the temperature?

2539




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?

937

if the flow rate is increases then any changes in retention time in hplc

1 5528

Whatn is HPLC

Orchid, Jubilant, HPLC,

1 4727

what is the limit of Correlation for IR test compare to the standard and test

Nakoda Chemicals,

3 5999

IS THERE ANYWHERE MENTION THAT THE RE PROCESS BATCH REQUIRE TO KEPT STABILITY STYDY

Nakoda Chemicals,

2 3792




why holmium perchloate solution in Uv calibration

Alembic,

2 7876

why do we have to used saturated ammonia in TLC

Cipla, IPCL, Mylan,

3 8095

stability study is going on up to 3years for famotidine-USP but the pharmacopeia is revised and tlc test is replaced with hplc test. At the 4th year frequency the product is failed in hplc test .how can i assain the expiry or retest date and can i stop or continue the programme?

Nakoda Chemicals,

2 3752

how to correct peak when peak comes broader in shape? How to do calibration of HPLC?

Mankind,

2 5474

HOW TO CALIBRATE HPLC OVEN

Mylan,

1 4441

What is importance of pH in the Heavy metal test and How it effect on the test results?

1006

which light is used in FT-IR spectroscopy

Hetero,

6 12168


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Un-Answered Questions { Analytical Chemistry }

Why acetonitrile and water are used as extraction solvent when analysis melamine? I thought they are miscible and won't be able to separate...

334


What are usp limits for theoritical plats,resoution,tailing factor,peak to valley ratio

376


What is column in chromatography?

863


Tell me about analytical method validation in QC

2122


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

1217






what is the importence and role of LCMS and LCMS/MS and their applications? which type of compounds are analysis by lcms?

2349


what is partion and column chromatography

1085


what is the difference between potentiometric titration and karl fischer titration?

1239


How can we confirm the HPLC column is end-capped or not? Is it possible to identify by physical appearance?

1899


In GC calibration,what is the procedure to calibrate the TCD (thermal counductivity detector)suggest ?

1969


which one is better separation in high pressure liquide chromatogram orlowpressure chromato gram in hplc

991


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

1107


Colorimtry

276


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

386


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

244