Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

In my analysis by HPLC,In sample main peak and placebo peak are eluting with shorter resolution ( almost look like doublet). how can i get max resolution ? Is changing gradient method is usefull?

3 8366

what is the need of calulation of RRF of impurity in HPLC analysis?

9 21558

why SGF media used for dissolution . What is the use of it .can we use other media of lower pH instead ot this?

1 6060




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

Graviti Pharmaceuticals,

1200

How do we get end points and how many end points are possible for citric acid and di-acid not theorotically answer should be given practically.

Reddy Labs, Hetero,

1213

only one end point is possible for citric acid and we get 2 end points for di acid why?

Reddy Labs,

3 5325

why kf factor coming 0.5

Alkem Labs,

5 11769

For Recent draft guidelines for Dissolution test apparatus calibration, why removing the salicylate tables?

Alkem Labs,

3 6506




How can v calibrate ftir ? Plz explain me

Cipla,

2 14464

what is the diff betwen calibration and system suitability?

8 13381

Why Methanol used in KF Titration?

Lupin, Glenmark,

15 48633

Why do we use 500ppb sucrose and 500ppb 1,4 benzoquinone in TOC calibration?

Vardhman,

2 5775

why chiral separation?

1 5927

what is main use of primary standards in caliration

Lupin, Nectar Lifesciences, Lee Pharma,

2 3049

what are the important specifications for a Column ?

2 7048


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Un-Answered Questions { Analytical Chemistry }

Can we interpret accuracy from linearity in method validation?

755


WHAT IS THE USE OF STARTER ?????????

1089


Why potassium dichromate is used in calibration of uv?

291


How to check hplc detecter sensitivity?

233


What are modes of quantification in related substances

892






how to calculate corelation coefficient in G.C Calibration? what is the calculation part?

979


WHAT IS DIFFERENCE B/W MALTINGRANG/DSC

1163


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

1094


how the compound separate in coulunm,explain

1024


4. Describe the operation of the Craig apparatus. Chapter.3 Equilibrium Processes in Separations

1279


could negative ions be produced by bombardment process in mass spectrometry?

193


In HPLC (Waters) software Empower1,2 &3 what is the updation for each version

1412


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

6097


How much is the standard area for glc analysis

934


How would you decide dissolution medium for NCE compound of class I drug

728