Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

what is rs test why we are perfoming rs test

2 5690

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



What is difference between silica used in TLC and HPLC column

Cipla, Meghmani Organics,

4 13128

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


7 12205

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,

4 8874

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

Orchid, Neuland,

7 16226

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

2 4647

How to know HPLC column performance?

Meghmani Organics,

4 7976

What is heavy water

Meghmani Organics,

2 5435

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?


1 2800

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


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

2 4926

difference between instrumenent and equipment

6 8230

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 1368

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Un-Answered Questions { Analytical Chemistry }

sop of a uv visible spectrophotometer double beam elico model


What is the main difference between ODS1 and ODS2 Hplc column.


Why we check moisture,ash & AIA in product


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


In HPLC (Waters) software Empower1,2 &3 what is the updation for each version


How to start the dissolution development for unknown tab?


How much is the standard area for glc analysis


What is viod volume and peak purity in HPLC?


What is FFA, PV, and PAV value in oil.


pharma industries oriented


What is the diference between residual solvents and organic volatile matter


for heavy metal test lead used in which form pure form or any other form for preparation of lead standard sol


I have compare C2H2-air and C2H2-N2O flame AAS on determination calcium. Both use same range of std to plot calibration curve. (2-6ppm) When i measure the sample with phosphate, KCl and LaCl, C2H2-N2O flame give false positive result, around 0.5ppm. When i measure the sample with phosphste, KCl and EDTA. C2H2-N2O flame also give 0.5ppm false positive. But both above mentioned sample would not give false positive when measured by C2H2-air flame. What is the reason?


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


Home heating oil or furnace oil what is made from? Can (base oil plus diesel/kerosen) = home heating oil?