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 8221

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


11 22002

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

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

12 48373

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

2 10905

what split ratio in gas chromatography.

Cipla, Glochem,

9 35554

significane of detector wavelength accrucy in calibration of hplc

1 3937

signifcance of detector lenearity in calibration f hplc

3 5238

injection volume accruacy test i calibration of hplc


3 11653

verification of wave number why you are use in IR calibration

2 4940

control of resolution in calibration of IR

3 6227

defination of wavelength & wave number

4 9235

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


4 6878

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


7 81572

which brands HPLC COLUMN available in market

11 13588

calibrtion procedue of LC-MS

GVK, Matrix,


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Un-Answered Questions { Analytical Chemistry }

how to get accurate result for Residue on evaporation in purified water


what is peak purity and its formula


what are the standard methods for HPLC?


how to calibrate hplc & gc


USP methodology, EP methodology, IP methodology, among three if possible to use one methodology for qualify working standard to use USP, EP, IP ? Please explain...


what is %labelled amount in content uniformity of dosage unit and its calculation?


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


2. Two grams of Benzoic acid are dissolved in 200 ml of water and extracted with 200 ml of diethyl ether. The distribution coefficient of benzoic acid is 100, and its dissociation constant is 6.5 10-5. Calculate the distribution ratio (D) of benzoic acid at pH 2, 5, and 6. 3. Calculate D at pH 2 to 10 (1 unit apart) in the above problem, and plot D versus pH.


Tell me something about Vitamin A test method by HPLC


pharma industries oriented


what is the origin to prepare standard operating procedure


what is the structure of DOWEX-50


What is the difference between purge septum flow and column flow in gas chromatography?


1.What is the difference between method validation and method verification 2.Which guidelines proposed to method transfer


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