Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

when we use pda detector in hplc instead of uv detector

Hetero,

6 16317

why we use holmiumperchlorate in calibrating uv

DRL, Aurobindo, MSN Pharma,

4 12561

why chiral compounds will rotate the plane polarized light in SoR.

GVK,

4 9068




Why sulpuric acid only used to ROI but not used nitric acid and some other acids?

Cadila, Ranbaxy, Laurus,

6 16432

how we do assay of urea, ammonium sulpate, ammonium nitro pospate etc

Alembic,

1 1096

what is difference of uv and pda

MSN Pharma, Akums, Shilpa Medicare, MSN,

13 52619

how can you do the analysis of compound given to u by hplc

1 4597

What is calibration procedure of gredient HPLC pump

4 19425




How to determine water content of thioanisole? which interfere by KF titration?

1 5340

what is dissolution

DRL,

6 17097

What is colimn selection Criteria in HPLC analysis?

4 10658

How to select buffer for HPLC mobile phase

Lupin, Cipla, Cadila,

4 16731

What is primary & Secondary Standard ? Give Example

Lupin, Cipla,

15 139787

Which buffer is used for LC/MS mobile phase & at What Conc.

3 7675

How we fix the validity period of a Normal solution and re-standardization due date

3 5357


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Un-Answered Questions { Analytical Chemistry }

Principle of single pan analytical balance

3489


how can delete the impurity in 1-(2:6 dichloro phenyl)-2-indolenone.and desolving the impurity in which solvent but does not desolve product in solvent.

1102


What is viod volume and peak purity in HPLC?

1253


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

623


what is weight veriation in pharma industry ? plz explain me

958






what is partion and column chromatography

963


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

644


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

860


In the isomers,enantiomers give the only physical properties present such that no chemical properties present.

879


what is impurity profile. how to interpret this impurity profile to a drug product or drug substance.

939


How to choose concentration of LOQ solutions for RS analysis? Example.

658


Why irmoisture balance is used for corrugated box moisture testing

966


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

1584


Home heating oil or furnace oil what is made from? Can (base oil plus diesel/kerosen) = home heating oil?

780


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

242