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Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

what is rs test why we are perfoming rs test

2 6966

In GC calibration,what is the procedure to calibrate the TCD (thermal counductivity detector)suggest ?

Orchid,

2289

What is difference between silica used in TLC and HPLC column

Cipla, Meghmani Organics,

4 15777

Why Urasil and Caffeine use for HPLC wavelength accuracy calibration. which is most suitable, Why? other than these which can be used?

Cipla,

7 14639

When we r doing processing method for sst in Empower software by HPLC, What value has to give in void volume and as per which pharmacopia!

Micro Labs, Mylan,

5 11173

what is use of acetonitrile compare to methanol in RP-HPLC Method devlopment

Neuland, Orchid,

7 19433

is a bonded water molecule in an organic material can be easlisy and accuractly determined by KF rather than LOD

2 5578

How to know HPLC column performance?

Meghmani Organics,

4 10063

What is heavy water

Meghmani Organics,

3 6497

What will be the effect on HPLC analysis result if three mobile phases given separately through three valves and same proportion mixed together and given by one valve?

LOIL,

1 3648

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

1907

Why PH range from 0to14.

College School Exams Tests, Reddy Labs, Wings Customer Care,

2 11872

why you are using benzoic acid for water content determination in TEA

2 5838

difference between instrumenent and equipment

6 10214

mixed 1.0 ml of methanol and 1.0 ml of toluene and injected in gas chromatography.will you prove that both solvents are in the ratio 1:1(not by area normalization)

1 2133


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Un-Answered Questions { Analytical Chemistry }

why we are using hexane in calibration of number of drop per mL

586


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

669


What is stray light in uv what are units for stray light

582


What is related substance by HPLC impurity limits as per USP?

104


What are the primary considerations in extractables and Leachables ?

1358






please explain about aluminium hydroxide assay

262


why lactose has less charges when packed in steel containers when compared with packing of lactose in polyamide material?

1318


How much is the standard area for glc analysis

1295


how to selecet an exact coloumn for an new molecule development by hplc how to select exact salt as buffer for new molecule development by hplc what is the the process to select the mode of saparation of compoundes by hplc what is the use of ph of buffer what is use of buffer,ph,organic phase,ans methods how the molecules get saparated in coloumn,

1481


How to calculate coreletion coefficient

598


What should be the level/ Percentage of Arsenic in Arsenic free zinc.

1354


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

941


how the compound separate in coulunm,explain

1424


How to calculation of residual solvent methanol (3000 ppm) standard solution, and how many quantity used of test sample

1680


Why perchloric acid used for potentiometric titration

1684