Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

wen v have polr solvent then which type of column use in hplc

2 4973

What is Threshold in hplc?

Hetero,

2 13029

Why we use Caffeine in hplc calibration

Laurus, Emcure,

2 9750




what is the meaning of stress study?

Reddy Labs,

2 2026

what is the difference between potentiometric assay and hplc assay

Parabolic,

2 9894

why we are using buffer solutionas as a mobile phase in hplc.

2 7808

importance of internal standard and in what conditions it is used?

1 2239

how to selecet an exact coloumn for an new molecule development by hplc how to select exact salt as buffer for new molecule development by hplc what is the the process to select the mode of saparation of compoundes by hplc what is the use of ph of buffer what is use of buffer,ph,organic phase,ans methods how the molecules get saparated in coloumn,

1089




how to select short coloum and long coloumn for new molecule

Rampex Labs,

952

what is poarimeter, why it is used in pharma,and explain briefly about polarimeter?

GVK,

3 7371

Why KBR is used in IR for preparation of pellete, why it shows zero dipole moment

GVK,

7 7115

what is optical active and non active give examples?

GVK,

1 2758

what is custom fields in waters system?

Aurobindo, Akorn India,

1 5630

my name is santhosh i cmpleted b.pharmacy in 2009 then i went to uk in 2010 to pg diploma business management. after i came back to india.. recently again apply to uk for pharmaceutical analysis. they refused my visa you failed to explain y u r change subject. so plz ineed answer for y change the cource

1 1418

why kbr is used for pellet preparation in ir spectroscopy, give the reasons? why kbr shows zero dipole moment?

6 10417


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Un-Answered Questions { Analytical Chemistry }

What is viod volume and peak purity in HPLC?

1287


Which type of column should i use to check the purity of high molecular weight protein using HPLC reverse phase column chromatography? Hi everyone. I wanna to check the purity of high molecular weight protein (collagen) with MW of ~130 kDa using a HPLC. I know C18

607


2. Two grams of Benzoic acid are dissolved in 200 ml of water and extracted with 200 ml of diethyl ether. The distribution coefficient of benzoic acid is 100, and its dissociation constant is 6.5 10-5. Calculate the distribution ratio (D) of benzoic acid at pH 2, 5, and 6. 3. Calculate D at pH 2 to 10 (1 unit apart) in the above problem, and plot D versus pH.

824


What is Band broading effect explain

500


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.

1165






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

1613


mode of absorption in alimentary canal?

1105


What is third generation HPLC Columns?

638


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

981


While performing TOC sst analysis Zero shift disabled & sample analysis zero shift enabled why?

898


what is different when impergnated silica plates are used in separation of azo dyes using column chromatography?

632


What is stray light in uv what are units for stray light

175


what is difference between zero air gas and o2 gas

5723


How to do regeneration of Metacarb Pb plus column?

1216


Why potassium dichromate was using in Uv calibration?

186