Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

what are peak purity,peak purity index,peak thresold

2 16814

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 13788

What is (Q) point dissolution?

Cipla, Macleods,

6 24385

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

2 12356

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 11582

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

3 7761

what is the difference between system precision and method precision?

Teva Pharmaceuticals,

3 34248

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 6524

what is difference between moisture contents and water contents ?

Cipla, Hetero, USM,

12 55439

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

Reddy Labs,

2 10150

same sample on two preapration gives differnt result during hplc analysis

3 7069

what is titrent,& titrate

Graviti Pharmaceuticals,

2 12615

Why we are using a Kf Factor range 4 to 6

7 55796

What is difference between Chromatographic purity and Related substances analysis?

3 22032

Why we are using the methanol in Kf titration?

Reddy Labs,

6 19535


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Un-Answered Questions { Analytical Chemistry }

Many times I don't got a caffeine peak in calibration of hplc using guard column ❓

1134


In HPLC Calibration, On which basis RSD Limit of noise test is fixed (NMT 33.0 % )

2926


in which situation ion pair agent require to use?

244


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

1718


How to set specification of assay, fisdolution and related substances?

337






how you determine moist.of NaOH sol or NaOH flacks

1753


what type of questions asked on analytical balance and also give answers................all pharma companies?

11683


what is the importence and role of LCMS and LCMS/MS and their applications? which type of compounds are analysis by lcms?

3084


What is third generation HPLC Columns?

1486


what is difference between UV - VISIBLE MODEL NO like 1600,1601,1700 etc ? plz explain me

2193


how to set sample and standard concentration in RS method?

334


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

1735


1.What is the difference between method validation and method verification 2.Which guidelines proposed to method transfer

1272


In Assy by potentio metry titration method how select MET U ,DET U, SET U,

1280


How to determine the EDTA content by potentiometry titration in Ceftriaxine sodium

1955