Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

WAHT IS THE ELUTION ORDER IN GAS CHROMATOGRAPHY?

Micro Labs,

3 13299

what is the defferance between the potency and working standard

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

1 5174

what is the principle involved in determination of moisture content?

3 9649

what is difference between assay&purity&potency?

5 31101

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

Cipla,

1 3430

what is leading peak in hplc

Cipla,

1 11781

what is difference between drug products and drug substance?

DRL,

5 89391

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

Cipla, MSN Pharma,

1 3481

how you determine moist.of NaOH sol or NaOH flacks

1762

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

1 4336

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

Matrix,

10 48832

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 10255

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

Arch Pharmalabs, Natco,

3 9733

why use benzophenone & caffene acetone in hplc calibration

1 16582

why use k2cr2o7 , kcl h2so4 in uv calibration

DRL, GVK,

1 9797


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Un-Answered Questions { Analytical Chemistry }

why holium oxide prepared in 10% HCLO4 SOLUTION

985


Please give idea about method development for cleaning method and how maco level establish

260


How to establish relative response factor for hplc. Why it is required?

686


about method developement in hplc

1200


What is shaking level in GC?

320






what is the acceptance criteria for enteric coated tablets in 0.1n hcl validation in each parameter?

326


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

1367


Difference between hlaf and rlaf

1637


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

1762


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

2453


what is the principle involved in turbidometry and nephelometry ?

3621


What is related substance by HPLC impurity limits as per USP?

541


why salisylic acid not using now days for disdolution calibration?

290


what is difference in ods I ods II is this is realy from sorbent / packing characteristics or from other means

1480


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

1747