Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

why urasil use in hplc column perfomance?

Bayer,

1 5680

how do you perform reverse enginearing study for drug containing sodium chloride sodium citrate sodium bicarbonate

Strides,

1 2285

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

Micro Labs, Adley,

1240




WHAT IS THE PURPOSE WE USE HCL, CHOPPER, BURNER, MONOCHROMATOR in AAS? PLEASE EXPLAIN BRIEFLY

1071

what is the working priniciple of ph, what are parts in ph meter

1 7190

why using the ph 4,7,9.2?

SRF,

1 3323

What is Temperature ?

Reddy Labs,

2 7271

What is the column performance and column efficiency?

Reddy Labs,

1 8226




why we are using in ph calibrations ph4,7,9.2 buuffers only?

Reddy Labs, Unichem,

3 12256

Is it necessary to validate both assay and related substances for usp official methods for products.

Apotex,

6 8249

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

Natco, Dr Reddys, Indoco Remedies,

1507

IS THERE ANY EQUIPMENT TO CHECK AND CALCULATE THE POLARITY OF A LIQUID?

Reddy Labs,

1225

what is the difference between lod and loq?

Apotex, Aurobindo,

4 25911

What should be the level/ Percentage of Arsenic in Arsenic free zinc.

Pharmaceutical, FDC, Laurus,

1025

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

Dr Reddys,

2494


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Un-Answered Questions { Analytical Chemistry }

please explian me about area normalisation method,diluted standard method,impurity vs impurity and which one has to be selected in method development

325


in dissolution in one tablets two molecule one is losartan & second is HCTZ losartam is complies in s1 stage & hctz is complies in s2 stage then how to report result losartan s1 stage result or losartan s2 stage result

908


Why do we use KMnO4 in the test of control of obsorbance ? and why do we take specific quantity i.e 57-63mg?

1301


what is the structure of DOWEX-50

3689


about method developement in hplc

388






what is the different in Total ash, sulphated ash, acid insoluble ash, alcoholic or non alcoholic ash?

7030


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

1240


A ha tc is actual defination of retention time?

227


What should be the level/ Percentage of Arsenic in Arsenic free zinc.

1025


explain 5 components of gas chromatography ?

667


How they found 1mL of K.F reagent is equivalent to 5mg of water and if we change the composition of K.F reagent, is it can neutralize more amount of water?

353


what is the purge flow & how to calculate

1174


mahagenco syllabus for the post of chemist

4904


Why we check moisture,ash & AIA in product

472


Why Ethanol is Used for Standardization of GC Head space?

2613