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 9949

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

5 9384

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


1 33953

What is Signal to noise ratio?

3 8501

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

Millennium, GVK,


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 8312

Why forced degradation studies are performed in hplc method validation?


6 17116

why base line not starts from zero in gc?

Aurobindo, Reddy Labs, FDC,

1 7171

how to regulate noise in HPLC?

Vimta Labs, Alkem Labs,

2 3756

What is split

Vimta Labs,

4 7955

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

Vimta Labs,

3 8967

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,


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 4294

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

Ranbaxy, Vimta Labs, Graviti Pharmaceuticals, Orbit Pharma,

1 5488

what is the peak purity concept?

Vimta Labs, Graviti Pharmaceuticals,

4 15809

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Un-Answered Questions { Analytical Chemistry }

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


Why a1% value is used for some product ? What is the criteria for selection a1% value ?


Which std. used for standrdisation of ZnSO4?


USP methodology, EP methodology, IP methodology, among three if possible to use one methodology for qualify working standard to use USP, EP, IP ? Please explain...


Difference between hlaf and rlaf


all types of questions asked at the cipla interview


What is the acceptance criteria for moisture balance when calibrated with sodium sulfate


What is diffrence between extractable volume and deliverable volume? Answer pls


In IR spectra, generally a molecule vibrates without apply emr or ir light?




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


Explain the relations between number of carbon atoms in alkanes and retention time ?


As per ICH related substances stability trend limit from initial to shelf life


how does h2so4 prevent oxidation of mohr salt before it is titrated?


why we use a particular hplc column for a particular compound give reasons?please