Analytical Chemistry Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Analytical Chemistry Interview Questions

Questions Answers Views Company eMail

what are peak purity,peak purity index,peak thresold

2 18246

1)why use benzophenon,uracil in hplc calibration. 2)why use sucrose in polarimeter calibration. 3)what is S/N ratio, noise and drift in hplc 4)how we can find lod and loq in method validation

1 14963

What is (Q) point dissolution?

Cipla, Macleods,

6 27071

Why we are using K2Cr2O7 for control of absorbance in UV?

2 13547

1 why polyesterene film used for ftir calibration ? 2 why k2cr2o7 is used for control of abs in uv ? 3 why holmium oxide used for control of wavelength in uv

3 13063

what is the principal of malvern particle sizer & its used in pharma industry

3 9466

what is the difference between system precision and method precision?

Teva Pharmaceuticals,

3 37137

In lcms analysis some times we get sodium and potassium adducts. if the compound is havine sodium ions how can we confirm wether sodium is from sample or it is a adduct?

Teva Pharmaceuticals,

2 7752

what is difference between moisture contents and water contents ?

Cipla, Hetero, USM,

12 60530

In GC, What does 'Column condensation test' mean by?

Reddy Labs,

2 11746

same sample on two preapration gives differnt result during hplc analysis

3 8607

what is titrent,& titrate

Graviti Pharmaceuticals,

2 13871

Why we are using a Kf Factor range 4 to 6

7 61091

What is difference between Chromatographic purity and Related substances analysis?

3 23634

Why we are using the methanol in Kf titration?

Reddy Labs,

6 22088

Post New Analytical Chemistry Questions

Un-Answered Questions { Analytical Chemistry }

about method developement in hplc

1761

How to decide assay range for non pharmacopeial API analysis by HPLC? Could you give me any reference for same e.g Guidelines or Paper publications?

3403

what is lod and loq ?,why use k2cr2o7 , kcl h2so4 in uv calibration ?,why use benzophenone & caffene acetone in hplc calibration ?,what is leading peak in hplc ?why we do the calibration of limit of stry light in hplc & uv ?

3723

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

2276

If change in specification which parameter require to do for validation? if change in chromtographic condition then which parameter? if api change then which parameter? if change composition then which parameter? if old method not work out then whicj parameter? if additional one impurity added then which parameter of validation require to do on above each conditions? elaborate separately

907

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

2364

in which situation ion pair require to use?

878

Why acetonitrile and water are used as extraction solvent when analysis melamine? I thought they are miscible and won't be able to separate...

1752

Why irmoisture balance is used for corrugated box moisture testing

2451

why we use glass fiber filters use in some situation?

848

how require to interprit the method precision data of hptlc?

869

how you confirm the assay method?

826

which are the sizes of capsules?

1045

Why potassium dichromate is used in calibration of uv?

2038

what is mean by dissolution biowaiver study?

995

For More Un-Answered { Analytical Chemistry } Questions Click Here