Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

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

Amoli Organics,

1 1345

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

Biocon,

1 1908

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

591




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

Cipla,

1 3185

What about karl fischer reaction mechanism ?

Mylan, Aurobindo,

1 3695

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

482

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

IDA,

478

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

860




What attracted you to analytical chemistry?

481

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

Dr Reddys,

2 1751

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

Dr Reddys,

1 1839

What is third generation HPLC Columns?

Emcure,

599

what is third integration

Orchid,

634

Why sodium hydroxide used for maintain pH of phosphate buffer

Medicamen Biotech,

822

What is the deference between Residual solvents and OVI

RA Chem Pharma,

1 926


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Un-Answered Questions { Analytical Chemistry }

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

1318


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?

822


what is the identification test of volatile substance? what is volatile compound?

895


How can we calculate "confidence interval" in analytical method validation? Pl. explain with example.

2324


What are modes of quantification in related substances

801






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

863


What is Band broading effect explain

477


Which std. used for standrdisation of ZnSO4?

953


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

1241


Why only Copper standard is used to calibrate Atomic Absorption spectrophotometer?

1139


Colorimtry

143


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

169


calibrtion procedue of LC-MS

1173


How can we calculate offset value pH measurment

120


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

1063