Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

WAHT IS THE ELUTION ORDER IN GAS CHROMATOGRAPHY?

Micro Labs,

3 9957

what is the defferance between the potency and working standard

Matrix, Orchid, Caplin Point, Arbro Pharmaceuticals, ECOlogics, Venus Remedies,

1 3405

what is the principle involved in determination of moisture content?

3 7418




what is difference between assay&purity&potency?

5 24976

why we do the calibration of limit of stry light in hplc & uv

Cipla,

1 1608

what is leading peak in hplc

Cipla,

1 9939

what is difference between drug products and drug substance?

DRL,

5 77018

From peak purity spectrum, where or at which point peak purity angle & purity threshold is checked?

Cipla, MSN Pharma,

1 1780




how you determine moist.of NaOH sol or NaOH flacks

1083

what is concentration of oxygen in U.H.P. grade N2 cylinder

1 3068

water is more polar than acetonitrile.but in reverse phase chromatography peaks elute earlier when we increse Acetonitrile.what is the reason.

Matrix,

10 36033

I got 88.0 % assay for a drug in HPLC analysis for same injection i got 40.0% related substances is it possible? what is the relation between results of assay and purity?

5 7364

hi i am m.sc organic chem and complete analytical lab tech dipolma now job in qc many time ask question you in m.sc organic why job in qc please help me i can not give proper ans please tell me

Natco, Arch Pharmalabs,

3 7362

why use benzophenone & caffene acetone in hplc calibration

1 12789

why use k2cr2o7 , kcl h2so4 in uv calibration

GVK, DRL,

1 7490


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Un-Answered Questions { Analytical Chemistry }

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

1025


HI,I CLEARED BOB CLERK EXAM. MY INTERVIEW WILL BE ON 9TH OCTOBER,2010.PLEASE SEND ME INTERVIEW QUESTIONS AND ANSWERS. THANK YOU.

1042


WHICH STANDARD WE USE IN SILICA ANALYSIS IN SILICA-GEL METHOD FOR SOLID SAMPLE

913


why we use Dichlorobenzene.nitrobezine.t-butyldi sulhate.for calibration of gc Head space

989


What is the purpose of octyl silane columns?

2759






what is the principle involved in turbidometry and nephelometry ?

2568


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

598


What is importance of pH in the Heavy metal test and How it effect on the test results?

1002


What is the principle of Thermal conductivity detector and FID?

1474


process of Diclofenac sodium,IP.

933


what is peak purity and its formula

255


Why we used in n-butyl acetate water content terminology while in ethyl acetate we used moisture content terminology?

600


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

731


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

1145


Why irmoisture balance is used for corrugated box moisture testing

1126