Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

if v use HELIUM & ARGON instead of NITROGEN as a mobile phase what happen in GC SYSTEM ?

Cipla, Reddy Labs,

5 8071

what is relationship between absorption and transmittance in u.v.?


11 21757

why we are using polystyrene film for calibration of I.R spectroscopy?

Abbott, Intas, Reddy Labs, Andhra Organics, RRR, Veritas, Kemwel, Zydus Cadila,

12 47682

why we cannot analysis below 200nm in u.v?

2 10747

what split ratio in gas chromatography.

Cipla, Glochem,

9 34996

significane of detector wavelength accrucy in calibration of hplc

1 3889

signifcance of detector lenearity in calibration f hplc

3 5132

injection volume accruacy test i calibration of hplc


3 11305

verification of wave number why you are use in IR calibration

2 4842

control of resolution in calibration of IR

3 6131

defination of wavelength & wave number

4 9097

what is LC - MS ? What its wide use in cro/pharmaceutical Industry


4 6819

what is difference between IR & FTIR ? how we calibarte both ? I want to know the procedure.


7 80947

which brands HPLC COLUMN available in market

11 13421

calibrtion procedue of LC-MS

GVK, Matrix,


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Un-Answered Questions { Analytical Chemistry }

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


what is definition of validation? which components are followed give detail?


how to select short coloum and long coloumn for new molecule


What is the purpose of octyl silane columns?


For titration in anhydrous media with perchloric acide, if lack of titrator, Which indicator is been used for replacement. How calculate pH of test solution to choose suitable indicator?


What is the acceptance criteria for moisture balance when calibrated with sodium sulfate


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


In Karl Fischer titration,What is the situation if the material tested is only soluble in water,and not soluble in the common solvents used such as methanol ?? [e.g. Iron III Hydroxide polymaltose]


what is partion and column chromatography


Explain the relations between number of carbon atoms in alkanes and retention time ?


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?


Which products will produce when acetic anhydride reacts with Ter-butanol, Sec-butanol, Iso butanol, Dimethylamine etc.


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.


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


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