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Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

What is Isotope tracer technique?

LAP, MAHINDRA, MPSC, PSI Data Systems, WNS,

1 5386

In Karl fischer titrator what medium we can choose to analysing aldehyde and ketone samples by using KF reagent

4 9521

Can we do the MC analysis of a sample which is not completely soluble in the medium choosed.

2 5221

what is reverse phase chromarography&normal phase chromatography

Aurobindo,

4 10068

what is difference between Performance check and Calibration?

1 12279

What is the correct way to digest milk powder to get the corrrect value of Fe and Zinc?

1 2767

why glutent are detected in the rice cereal baby food product even manufacturer claimed that they are using rice and milk only?we have using ELISA to do the test,and rice supposed not containing any glutent,rite?We already repeat the test so many times and it still detected.just wondering where the glutent came from?

1787

What is the reason for using the 900ml of dissolution medium

Cipla,

16 62578

what are the different methods of analysing related substances test,what are LOD AND LOQ .HOW TO REPORT IMPURITIES WHEN LOD AND LOQ LIMITS R SPECIFIED

Dr Reddys,

3 20840

Which type of material analysis in GC using Theramal conditivity detector ?

7 7293

suppose i give three compounds A,B,C how do u calculate assay of those three componds which method do u prefer

5 7613

why you require QA approval & what is its importance?

2 6033

wt is rsd in and explain

Cadila, Reddy Labs,

4 13258

what is the difference of use of LOD test and Karl Fischer titra.?

15 27049

What is the difference between Paddle and Basket Why we are using Basket or paddle in dissolution.

Apotex, Cipla, GSK, Intas, Zydus Cadila,

7 39899


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Un-Answered Questions { Analytical Chemistry }

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

2616


While performing TOC sst analysis Zero shift disabled & sample analysis zero shift enabled why?

1534


In BP2013, Loperamid HCl monograph. Assay by titration with 0.1N sodium hydroxide using hydrocloric acid 0.01N and reading the volume added between the 2 points of inflexion. I have a question that if the diluent solvent is ethanol is certainly consumed a amount of volume of titrant, so this volume must be eliminated on the result calculation or not apart from first point which is subtracted above.

1972


We use Potassium Dichromate solution for the calibration of UV-Visible Spectrophotometer in UV region. My question is to calibrate visible region which solution could be used in photometric accuracy

612


How can I develope method of dissolution by HPLC OR UV

1335






How to decide assay range for non pharmacopeial API analysis by HPLC? Could you give me any reference for same e.g Guidelines or Paper publications?

2252


In IR spectra, generally a molecule vibrates without apply emr or ir light?

906


Why use only methanol,used determinationof moisture content not use other solvents

229


what type of question will ask in the interview of lab chemist.

2418


what is the importance of peak purity in HPLC and how we can calculate through manul(not software)?

3467


WHY pKa value is more important than pH value of the mobile phase in HPLC?

664


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?

850


HI,I CLEARED BOB CLERK EXAM. MY INTERVIEW WILL BE ON 9TH OCTOBER,2010.PLEASE SEND ME INTERVIEW QUESTIONS AND ANSWERS. THANK YOU.

1293


what is third integration

1058


Ratio of Water and Acetonitrile(diluent) is not recommended to use in cleaning method validation,why?

1976