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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 9615

What is the procedure for UV-spectrophotometer calibration?

 6 60652

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

 4 14219

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,

2894

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

NCL,

3421

How can we Qualify a unknown impurity by HPLC

 3 12065

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

Orchid,

10 35627

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

Hikal, Lupin, Wockhardt,

25 117401

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

Dr Reddys, RB,

2 27977

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

 7 26709

why the same column give different retention time in hplc?

 7 14699

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

 5 14526

What is the major difference b/w Drift and Noise

Aurobindo, Dr Reddys, Reddy Labs,

4 37824

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

Quintiles,

3 13672

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

Cipla,

2 9012

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Un-Answered Questions { Analytical Chemistry }

Related substance method equivalency on control sample or spiked sample?

339

How they found 1mL of K.F reagent is equivalent to 5mg of water and if we change the composition of K.F reagent, is it can neutralize more amount of water?

1345

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

1379

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

2154

what is mean by ambient temperature?

401




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 ?

3229

How to determine the EDTA content by potentiometry titration in Ceftriaxine sodium

2029

How you develop a method in HPLC?

2117

How can we calculate "confidence interval" in analytical method validation? Pl. explain with example.

3644

what is the extinction coefficient for Indomethacin or at 319nm wave length.

3552

We use hicrome 10 cxs column in hplc analysis....pls tell me.. what is the meaning of 10 cxs?

1200

How to calculate coreletion coefficient

1190

WHICH STANDARD WE USE IN SILICA ANALYSIS IN SILICA-GEL METHOD FOR SOLID SAMPLE

1658

effect of pore size, pore volume, partical size, column length, carbon load on retention time? what is carbon load? what is the use?

369

Which is the highly polar and highly non polar column in HPLC?

1834

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