Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

WHICH PRESSURE IS HIGH EITHER INJECTOR OR DETECTOR IN GAS CHROMATOGRAPHY

Reddy Labs, Avon Organics, Dr Reddys,

4 6409

What is the procedure for UV-spectrophotometer calibration?

6 53549

What should be the calibration procedure for wavelength accuracy in case of HPLC?

4 10282




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?

NCL,

1809

How to compare XRD graphs against standard and carry polymorpism study of API's by powder XRD method?

NCL,

2519

How can we Qualify a unknown impurity by HPLC

3 9291

full name of OOS & OOT ? Dercribe it with details ? why this is needed in pharma industry ?

Orchid,

10 27023

why KBr is used in FTIR SPECTROSCOPY and why is it necessary to triturate KBr during FTIR analysis?

Lupin, Hikal, Wockhardt,

25 96908




what is stability study ? why it is needed and how itis done

Dr Reddys, RB,

2 22219

why water, methanol, ethanol ets solvents are used in UV SPECTRIPHOTOMETER for blank reading ?

7 19652

why the same column give different retention time in hplc?

7 10235

How will decide to use HPLC OR GC for developing method for unkown compund

5 10821

What is the major difference b/w Drift and Noise

Aurobindo, Reddy Labs, Dr Reddys,

4 29357

what king of work is done in Regulatory Affairs in Pharma industry ?

Quintiles,

3 11196

can some other acids like nitric acid or HCl can be used in the calibration of UV.Vis. spectrophotometer????

Cipla,

2 6527


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Un-Answered Questions { Analytical Chemistry }

function of detecter in hplc ,gc and spectroscopy? function of carrier gas in gc?

1162


mahagenco syllabus for the post of chemist

4850


what is the purge flow & how to calculate

1126


How can the GC or HPLC method is selected to determine the impurity profile in drug product?

5303


how you determine moist.of NaOH sol or NaOH flacks

953






What is the formula to determine the concentration of M of a solution given the % transmittance? Use %T = 43.7 as an example.

1259


calibrtion procedue of LC-MS

1207


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

928


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

1872


IS THERE ANY EQUIPMENT TO CHECK AND CALCULATE THE POLARITY OF A LIQUID?

1187


all types of questions asked at the cipla interview

3293


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

1108


how a particular wavelength can be different for a particular compund while analysing by uv and by HPLC.

1040


What is the difference between known and unknown impurities?

190


As per ICH related substances stability trend limit from initial to shelf life

1653