Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

why we use pyridine to determine moisture content of acetonel

Lee Pharma,

2 9485

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

Aventis,

2 5261

Which type of analysis we have to done uv spectroscopy

2 7025




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 8335

What is the difference between uplc and hplc

Hetero, AAU Assam Agricultural University,

4 22023

What is meaning of audit trail in hplc

Raks Pharma, Lee Pharma, DRL,

3 19706

How we can determine OOT limit in Stability

MSN Pharma,

2 10351

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

Glochem, Sidmak Laboratories,

1 4098




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,

1042

WHAT IS DIFFERENCE B/W MALTINGRANG/DSC

Glochem,

1273

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

995

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

Perkin Elmer,

6530

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?

6555

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

Cipla, Caplin Point,

4 7631

What is difference b/t uv detector and rid

5 6218


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Un-Answered Questions { Analytical Chemistry }

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

820


explain 5 components of gas chromatography ?

772


Why Ethanol is Used for Standardization of GC Head space?

2739


WHY pKa value is more important than pH value of the mobile phase in HPLC?

344


How can I develope method of dissolution by HPLC OR UV

1095






about method developement in hplc

490


what is the extinction coefficient for Indomethacin or at 319nm wave length.

2695


How will u perform degradation study in detectors other thann PDA in HPLC Methodology

1345


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

815


mode of absorption in alimentary canal?

1253


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 ?

2268


For limit test of heavy metals in BP, Method C require that the substance is ignited at a temperature not exceeding 800 °C. Why confines such the temperature?

2660


Why we check moisture,ash & AIA in product

633


Please tell me about the pH of Polycaboxylic ether is it in the 5-6 range ever or more than 6

1430


In HPLC (Waters) software Empower1,2 &3 what is the updation for each version

1552