Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

WAHT IS THE ELUTION ORDER IN GAS CHROMATOGRAPHY?

Micro Labs,

3 9572

what is the defferance between the potency and working standard

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

1 3211

what is the principle involved in determination of moisture content?

3 7212




what is difference between assay&purity&potency?

5 24237

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

Cipla,

1 1434

what is leading peak in hplc

Cipla,

1 9753

what is difference between drug products and drug substance?

DRL,

5 75500

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

Cipla, MSN Pharma,

1 1609




how you determine moist.of NaOH sol or NaOH flacks

997

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

1 2960

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

Matrix,

10 35236

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 7148

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 7192

why use benzophenone & caffene acetone in hplc calibration

1 12313

why use k2cr2o7 , kcl h2so4 in uv calibration

GVK, DRL,

1 7227


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Un-Answered Questions { Analytical Chemistry }

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

925


explain 5 components of gas chromatography ?

638


What is the exact reason to use THF and IPA in buffers of Reverse phase HPLC as a solvent?

2472


In dissolution of tablets/capsules elaborate the Dissolution limit 20.0% to 60% Q in 30 minutes.

709


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

540






all types of questions asked at the cipla interview

3328


for heavy metal test lead used in which form pure form or any other form for preparation of lead standard sol

3556


how to select short coloum and long coloumn for new molecule

1008


why we are using benzene, anyline in acetic anhdride assay titration method?

807


how much mass should be there in volumetric flask while in preparation of sample for assay? 

1137


Why sometime potassium ortho phosphate mix with acetone use for sample preparation for hplc

232


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

1219


What are modes of quantification in related substances

869


when we talk about change in entropy we consider total entropy means of surround +entropy of system but when we talk about change in Gibss free energy we consider entropy of system.explain with reason.

759


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?

5726