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 8121

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

9 21116

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

1 5925




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

Graviti Pharmaceuticals,

1136

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,

1162

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

Reddy Labs,

3 5216

why kf factor coming 0.5

Alkem Labs,

5 11492

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

Alkem Labs,

3 6350




How can v calibrate ftir ? Plz explain me

Cipla,

2 14120

what is the diff betwen calibration and system suitability?

8 12957

Why Methanol used in KF Titration?

Lupin,

15 46914

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

Vardhman,

2 5600

why chiral separation?

1 5796

what is main use of primary standards in caliration

Lupin, Nectar Lifesciences, Lee Pharma,

2 2878

what are the important specifications for a Column ?

2 6875


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Un-Answered Questions { Analytical Chemistry }

what is third integration

659


We use hicrome 10 cxs column in hplc analysis....pls tell me.. what is the meaning of 10 cxs?

203


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

1221


wat is the role of michelson interferometer in FTIR and He-Ne lase.detailed answer required in simple language

1024


Why irmoisture balance is used for corrugated box moisture testing

996






mode of absorption in alimentary canal?

1105


How we can determine water content in piperazine

843


what is difference between zero air gas and o2 gas

5717


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

6763


What are usp limits for theoritical plats,resoution,tailing factor,peak to valley ratio

239


How can we calculate "confidence interval" in analytical method validation? Pl. explain with example.

2360


In GC calibration,what is the procedure to calibrate the TCD (thermal counductivity detector)suggest ?

1872


how can I make the copper get white bye any salt or acit?

944


What is the difference between known and unknown impurities?

188


Describe your field experience sample type collected,sample techniques,field measurements taken and equipment used?

1402