Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

In Analytical method development related substance method when did follow w/w method when did follow area normalisation method

Dr Reddys, Sun Pharma,

2 10110

In Analytical method development related substance method when did follow w/w method when did follow area normalisation method

5 9606

why a ph meter require KCL solution for their storing condition?

Aurobindo,

1 34539




What is Signal to noise ratio?

3 8677

what is the importence and role of LCMS and LCMS/MS and their applications? which type of compounds are analysis by lcms?

Millennium, GVK,

2245

I have 1 gram of Diphenylamine and want to make a 10,000 or 1000 ppm solution in methanol. How do I make this?

Midas Technologies,

9 8438

Why forced degradation studies are performed in hplc method validation?

Apex,

6 17355

why base line not starts from zero in gc?

Aurobindo, Reddy Labs, FDC,

1 7275




how to regulate noise in HPLC?

Vimta Labs, Alkem Labs,

2 3876

What is split

Vimta Labs,

4 8104

What is the purpose & importance of using the polystyrene film in ir calibration?

Vimta Labs,

3 9096

Why do we use KMnO4 in the test of control of obsorbance ? and why do we take specific quantity i.e 57-63mg?

Reddy Labs, Vimta Labs,

1233

why 1.2%kcl solution is using in limit os straylight?and why this test used for uv calibration?

Vimta Labs, Reddy Labs, Graviti Pharmaceuticals,

1 4469

why 0.02% solution toluene &noHexane using in uv calibration?

Ranbaxy, Vimta Labs, Graviti Pharmaceuticals, Orbit Pharma,

1 5641

what is the peak purity concept?

Vimta Labs, Graviti Pharmaceuticals,

4 16169


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Un-Answered Questions { Analytical Chemistry }

How can we calculate offset value pH measurment

148


What is importance of pH in the Heavy metal test and How it effect on the test results?

893


what is lod and loq ?,why use k2cr2o7 , kcl h2so4 in uv calibration ?,why use benzophenone & caffene acetone in hplc calibration ?,what is leading peak in hplc ?why we do the calibration of limit of stry light in hplc & uv ?

2028


why we do the calibration of limit of stry light in hplc & uv

1342


how the compound separate in coulunm,explain

964






about method developement in hplc

348


if you have given a blank water how you analyse by general analytical techniques?

653


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

980


why equlirium conatant of water have 14 value

872


what parameters we will consider while developing a HPLC method and how we confirm our HPLC method is valid?

2145


why octanol used to determine the partition coefficient ?

920


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?

1198


We use hicrome 10 cxs column in hplc analysis....pls tell me.. what is the meaning of 10 cxs?

203


Principle of single pan analytical balance

3561


How to compare XRD graphs against standard and carry polymorpism study of API's by powder XRD method?

2519