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Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

WHICH PRESSURE IS HIGH EITHER INJECTOR OR DETECTOR IN GAS CHROMATOGRAPHY

Avon Organics, Dr Reddys, Reddy Labs,

4 8797

What is the procedure for UV-spectrophotometer calibration?

6 59409

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

4 13396

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,

2621

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

NCL,

3184

How can we Qualify a unknown impurity by HPLC

3 11329

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

Orchid,

10 33791

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

Hikal, Lupin, Wockhardt,

25 113096

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

Dr Reddys, RB,

2 27240

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

7 25352

why the same column give different retention time in hplc?

7 13549

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

5 13516

What is the major difference b/w Drift and Noise

Aurobindo, Dr Reddys, Reddy Labs,

4 36201

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

Quintiles,

3 13020

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

Cipla,

2 8429


Post New Analytical Chemistry Questions

Un-Answered Questions { Analytical Chemistry }

How to establish relative response factor for hplc. Why it is required?

493


how pda detector works over uv?

93


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

1199


about method developement in hplc

1039


what is difference in ods I ods II is this is realy from sorbent / packing characteristics or from other means

1332






why multimedia dissolution require to do?

111


what is lod and loq ?,why use k2cr2o7 , kcl h2so4 in uv calibration ?,why use benzophenone & caffene acetone in hplc calibration ?,what is leading peak in hplc ?why we do the calibration of limit of stry light in hplc & uv ?

2932


What is vial equlibriation in Gc?

135


what is diffrence between specificity and selecivity?

104


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

126


How can we calculate offset value pH measurment

845


which are the guidelines for force degradation studies?

118


How do we get end points and how many end points are possible for citric acid and di-acid not theorotically answer should be given practically.

1778


which are the sizes of capsules?

199


is it necessary to do HPLC calibration at wavelength 315nm if we are doing analysis at this wavelangth

1381