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 10335

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

5 9838

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

Aurobindo,

1 35615




What is Signal to noise ratio?

3 8967

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

Millennium, GVK,

2299

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 8642

Why forced degradation studies are performed in hplc method validation?

Apex,

6 17761

why base line not starts from zero in gc?

Aurobindo, Reddy Labs, FDC,

1 7424




how to regulate noise in HPLC?

Vimta Labs, Alkem Labs,

2 4068

What is split

Vimta Labs,

4 8307

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

Vimta Labs,

3 9311

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,

1302

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 4722

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

Ranbaxy, Vimta Labs, Graviti Pharmaceuticals, Orbit Pharma,

1 5893

what is the peak purity concept?

Vimta Labs, Graviti Pharmaceuticals,

5 16744


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Un-Answered Questions { Analytical Chemistry }

How they found 1mL of K.F reagent is equivalent to 5mg of water and if we change the composition of K.F reagent, is it can neutralize more amount of water?

354


In Dissolution Test why limit is define Q+5% what is the role of +5%.

1469


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

3590


what is peak purity and its formula

199


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

784






Identify problem faced when mass spectroscopy is used with HPLC system ?

680


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

281


Why acetonitrile and water are used as extraction solvent when analysis melamine? I thought they are miscible and won't be able to separate...

255


Why we check moisture,ash & AIA in product

474


In HPLC calibration, caffeine is used as primary standard for wave length calibration due to caffeine is having dual maxima at 273 & 205 nm and one minima at 245 nm. Any body can give reference of these details from any pharmacopeia (with chapter no.) or any other authentic guideline?

311


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

720


WHAT IS THE PURPOSE WE USE HCL, CHOPPER, BURNER, MONOCHROMATOR in AAS? PLEASE EXPLAIN BRIEFLY

1072


are there in uv lamb that is chractrestic for wavelenghth 205 nm ?????

713


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

1302


why we are using benzene, anyline in acetic anhdride assay titration method?

822