Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

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

Amoli Organics,

1 1714

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

Biocon,

1 2379

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

788




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

Cipla,

1 3886

What about karl fischer reaction mechanism ?

Mylan, Aurobindo,

2 4272

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

625

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

IDA,

622

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

1261




What attracted you to analytical chemistry?

616

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

Dr Reddys,

3 2493

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

Dr Reddys,

1 2268

What is third generation HPLC Columns?

Emcure,

784

what is third integration

Orchid,

788

Why sodium hydroxide used for maintain pH of phosphate buffer

Medicamen Biotech,

1022

What is the deference between Residual solvents and OVI

RA Chem Pharma,

1 1413


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Un-Answered Questions { Analytical Chemistry }

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

1130


what is the purge flow & how to calculate

1261


why does used dry caffien in HPLC calibration?

667


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

782


what is procedure of actual procedure for registration of drug?

721






WHY pKa value is more important than pH value of the mobile phase in HPLC?

152


in gas chromatography what is the difference between gas flow rate and average linear velocity ?

1078


how you determine moist.of NaOH sol or NaOH flacks

1111


Basic principle of ESI?

908


we are performed SOR for a particular product the limit is -6 to -10.We face particular bathes it is not meeting the specification.we performed diffrent instrument diffrent analyst we are getting diffrent diffrent results.solvent is dimethyl sulfoxide what could be the reasion

542


why we use a particular hplc column for a particular compound give reasons?please

1581


are there in uv lamb that is chractrestic for wavelenghth 205 nm ?????

786


If we do accuracy at same concentration at which linearity planned,what is the need to do linearity separately?

1030


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.

847


Why we check moisture,ash & AIA in product

575