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Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

Is it necessary to inject three replicate for accuracy in AMV.

Amoli Organics,

1 2377

Which is the best mobile phase to separate organic acids using C8 column. And how should the samples be prepared for hplc?

Biocon,

1 3161

What is the acceptance criteria for moisture balance when calibrated with sodium sulfate

1120

why 0.1M OR 1M Perchloric acid standardisation done after 24 hours?

Cipla,

1 4913

What about karl fischer reaction mechanism ?

Aurobindo, Mylan,

2 5205

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

988

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

IDA,

979

How to calculation of residual solvent methanol (3000 ppm) standard solution, and how many quantity used of test sample

1741

What attracted you to analytical chemistry?

951

what is the difference b/w water content & moisture content

Dr Reddys,

3 3904

which procedure we follow if 6th month of accelerated sample fail?

Dr Reddys,

1 3052

What is third generation HPLC Columns?

Emcure,

1133

what is third integration

Orchid,

1141

Why sodium hydroxide used for maintain pH of phosphate buffer

Medicamen Biotech,

1383

What is the deference between Residual solvents and OVI

RA Chem Pharma,

1 2258


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Un-Answered Questions { Analytical Chemistry }

WHAT IS THE CRITERIA FOR SELECTION OF TIME OF DISSOLUTION AND THE MEDIUM OF DISSOLUTION?

1761


Why sodium hydroxide used for maintain pH of phosphate buffer

1383


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

3000


Colorimtry

704


how you determine moist.of NaOH sol or NaOH flacks

1425






Ratio of Water and Acetonitrile(diluent) is not recommended to use in cleaning method validation,why?

2063


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

1653


How to fix the sample conc. in Related substances test by HPLC?

202


how a particular wavelength can be different for a particular compund while analysing by uv and by HPLC.

1468


In Assy by potentio metry titration method how select MET U ,DET U, SET U,

653


in sampling of raw material which side is pasted sampled labels

711


what is the purge flow & how to calculate

1575


what is the procedure for cleaning of lenses of hatr accesory of ftir instrument?

1443


For standardization of volumetric solutions, acceptance limit for concentration is considered as 10% of nominal concentration and %RSD as NMT 0.2% (for appropriate no. of replicates). But , if %RSD has not met, what should be further action?

597


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

1556