Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

IF HPLC CALIBRATION FAILED THEN WHAT YOU DO

6 24370

Optical Rotation*0.9477*100*200] Assay Of dextrose= ________________________________ 99.8* 200 why Factor=0.9477

Claris Lifesciences, Inven Pharmaceuticals, Levo,

1 9728

How you will select the runtime in HPLC for a drug in method development.

GVK, Lesanto Laboratories, Aurobindo,

6 14367




If compound Pka is 5 then which buffer you will select ?

GVK, Avra,

5 11136

what is the difference between BDS and ODS Columens and both are same or not

Micro Labs, Vasava Engineering Private Limited, IPQA, Intas,

2 55941

difference between HPLC & LC-MS

Lambda,

9 35570

difference between record & document ?

4 10037

in what basis wavelength will select for a compound at initial method development trials

Matrix,

4 8514




How did you conclude that when stressing a compond, all degradation products have eluted in chromatogram?

Matrix,

7 6583

how to prepare working standard in our laboratory aganist reference standard ?

Unichem, Merit Biolabs,

4 19651

What is boiling point ? & Explain.

2 5708

What is Delay & Dead Volume

2 11350

In method developement or in any analysis if we use small length column for analysis what happen then ? why ?

3 4625

difference between IR& FTIR

Cadila,

4 11780

1 % solution is equal to how much ppm

32 396031


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Un-Answered Questions { Analytical Chemistry }

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

2386


explain 5 components of gas chromatography ?

621


function of detecter in hplc ,gc and spectroscopy? function of carrier gas in gc?

1177


acceptance criteria for lod & loq by standard deviation of response and slope??

1147


what is %labelled amount in content uniformity of dosage unit and its calculation?

3537






We use Potassium Dichromate solution for the calibration of UV-Visible Spectrophotometer in UV region. My question is to calibrate visible region which solution could be used in photometric accuracy

133


What is column in chromatography?

763


why are measure gas flow " ml " in Gas chromatography

321


Home heating oil or furnace oil what is made from? Can (base oil plus diesel/kerosen) = home heating oil?

835


about method developement in hplc

364


why octanol used to determine the partition coefficient ?

937


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

621


In BP2013, Loperamid HCl monograph. Assay by titration with 0.1N sodium hydroxide using hydrocloric acid 0.01N and reading the volume added between the 2 points of inflexion. I have a question that if the diluent solvent is ethanol is certainly consumed a amount of volume of titrant, so this volume must be eliminated on the result calculation or not apart from first point which is subtracted above.

1571


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

206


How can we confirm the HPLC column is end-capped or not? Is it possible to identify by physical appearance?

1809