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Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

why we use pyridine to determine moisture content of acetonel

Lee Pharma,

2 10869

What impact analysis required for out of calibration and how to proceed

Aventis,

2 6148

Which type of analysis we have to done uv spectroscopy

2 7836

From where 16 or 5.545 is derived in theoretical plates calculation formula by USP or JP/BP/DAB and what is meaning of this coefficient and impact in calculation ?

Nectar Lifesciences,

2 9425

What is the difference between uplc and hplc

AAU Assam Agricultural University, Hetero,

4 23454

What is meaning of audit trail in hplc

DRL, Lee Pharma, Raks Pharma,

3 21546

How we can determine OOT limit in Stability

MSN Pharma,

2 11968

why we are using k2cr207 in uv calibration ? why we r not using kmno4?

Glochem, Sidmak Laboratories,

1 4894

can we use the same detector in HPLC as well GC and what could be the differences we can find in the final chromato graph in any aspects?

Cipla, XYZ,

1317

WHAT IS DIFFERENCE B/W MALTINGRANG/DSC

Glochem,

1521

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

1316

what is the principle of UV Vis spectroscopy, AAS, ICP OES,ICPAES, ICP-MS and FTIR

Perkin Elmer,

7371

What is the principle of HPLC, GC, LCMS, GCMS,LC QQQ, GC QQQ, LC Q TOF and GC Q TOF. What are the applications and Specificity?

7435

What is the difference between Spectroscopy and spectrophotometry,What are the applications?

Caplin Point, Cipla,

4 8870

What is difference b/t uv detector and rid

5 7294


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Un-Answered Questions { Analytical Chemistry }

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

1209


How can we detect a compound in hplc which does not have any chromofore?

217


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

1884


How do we fix the sample concentaryion in hplc method development?

223


Why perchloric acid used for potentiometric titration

1705






In the isomers,enantiomers give the only physical properties present such that no chemical properties present.

1357


What is intact assay method development.....?

1539


1)What's the meaning of Absorption,give a example. 2)What's the meaning of Adsorption,give a example. 2)what is the difference between Absorption and Adsorption.

1885


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

1038


UV and PDA detector, which have less signal to noise ratio?

187


What is the calibration of uv process and preparation

1100


We use Potassium Dichromate solution for the calibration of UV-Visible Spectrophotometer in UV region. My question is to calibrate visible region which solution could be used in photometric accuracy

691


Why irmoisture balance is used for corrugated box moisture testing

1451


why lactose has less charges when packed in steel containers when compared with packing of lactose in polyamide material?

1340


is it necessary to do HPLC calibration at wavelength 315nm if we are doing analysis at this wavelangth

1019