Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

What is difference between Potency & purity

3 14159

how to hplc calibrated

Dr Reddys, Glochem,

4 51707

state the principle of gas chromatography?

5 12668

Why noise test is performed at 254 nm in calibration of HPLC system?

4 17403

some compound havving uv region but not give much more response during hplc analysis

2 6996

I have got selected for Aurobindo Pharma AR&D, HR person is asking me to sign in agreement. can I join?

Aurobindo,

19 41539

Why sulfuric acid is used in sulphated ash / residue on ignition test.

CS Pharmaceuticals, Dr Reddys, GVK, HPLC, Micro Labs, Samrudh, Watson Pharmaceuticals, Wings Customer Care,

9 76557

what are the basic requirement for the WHO audit?

BioPlus,

1 8752

What is the thickness of polystyrene film?

Pharmaffiliates Analytics and Synthetics,

8 18078

During Validation study, Recovery is passing at all levels but Linearity is failing. Justify?

Mylan, Torrent Pharma,

1 4412

What is Stray light ? & what is the IMP of this

2 9600

how can I make the copper get white bye any salt or acit?

1890

If we do accuracy at same concentration at which linearity planned,what is the need to do linearity separately?

1988

why we use only sucrose in the calibration of polarimeter?

Kilitch,

7 26701

What is the Deference between Bulk density & Tap density ?

Hikma Pharmaceuticals, Neuland, Reddy Labs,

2 24685


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Un-Answered Questions { Analytical Chemistry }

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?

2515


What is the accrptance criteria in RSD for RS method precision on basis of impurity percentages?

558


What is mean by PDR?

536


Related substance method equivalency on control sample or spiked sample?

491


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

1803


Please give idea about method development for cleaning method and how maco level establish

467


How require to develop GC method? how to select diluent, GAS, column selection and other chromatographic conditions?

477


In Dissolution Test why limit is define Q+5% what is the role of +5%.

2800


how you fix the limits of impurities?

559


What is the difference between Discriminating media and DPDM(Dissolution Profile with Different Media)

7230


How to choose the which salt is suitable for mobilephase

2923


Principle of single pan analytical balance

4814


How to set analytical specification for combination products?

570


In the HPLC Calibration done wavelength accuracy done between 200nm-280nm .but not done remaining 300-400nm not done ?

675


when we talk about change in entropy we consider total entropy means of surround +entropy of system but when we talk about change in Gibss free energy we consider entropy of system.explain with reason.

1757