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 12754

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

5 14038

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

Aurobindo,

1 41066

What is Signal to noise ratio?

3 11900

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

GVK, Millennium,

3028

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 13414

Why forced degradation studies are performed in hplc method validation?

Apex,

6 23163

why base line not starts from zero in gc?

Aurobindo, FDC, Reddy Labs,

1 9184

how to regulate noise in HPLC?

Alkem Labs, Vimta Labs,

2 6210

What is split

Vimta Labs,

4 11301

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

Vimta Labs,

3 11988

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,

2209

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

Graviti Pharmaceuticals, Reddy Labs, Vimta Labs,

1 7052

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

Graviti Pharmaceuticals, Orbit Pharma, Ranbaxy, Vimta Labs,

1 7788

what is the peak purity concept?

Graviti Pharmaceuticals, Vimta Labs,

5 25813


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Un-Answered Questions { Analytical Chemistry }

How do we quantify crystaline and amarpous forms by using (NMR, XRD)spectroscopic techniques? Which any others instruments are useful for this quantification? explain

1874


what is different when impergnated silica plates are used in separation of azo dyes using column chromatography?

1428


for which product require to do content uniformity? what is limit of cu?

228


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

2209


what is mean by covalidation

238






Why sodium hydroxide used for maintain pH of phosphate buffer

1746


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

1302


if content uniformity passing but dissolution varrying then what is next step?

288


What is Band broading effect explain

1313


why are measure gas flow " ml " in Gas chromatography

1076


which situation gc hs and gc als require to use?

205


what is difference in ods I ods II is this is realy from sorbent / packing characteristics or from other means

1415


What is the use of tlc and hplc? And when and where use?

592


how can give the expiry period and restadardisation of volumetric solution

1976


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

2471