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.?

Orchid,

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

HLL,

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

Ranbaxy,

4 6878

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

Cadila,

7 81572

which brands HPLC COLUMN available in market

11 13588

calibrtion procedue of LC-MS

GVK, Matrix,

1245


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Un-Answered Questions { Analytical Chemistry }

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

258


what is peak purity and its formula

181


what are the standard methods for HPLC?

1483


how to calibrate hplc & gc

3089


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...

530






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

3558


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

1700


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.

862


Tell me something about Vitamin A test method by HPLC

1315


pharma industries oriented

825


what is the origin to prepare standard operating procedure

947


what is the structure of DOWEX-50

3649


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

760


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

212


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

883