Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

What is void volume & dead volueme

Lupin, Bayer,

3 9538

How we will diapose UV (detector) lamp?

Bayer,

1 4642

Principle of single pan analytical balance

Bayer, Amneal Pharmaceuticals, Dr Reddys,

3656




what is the disso medium for tropsiun chloride

907

what is the meaning of linearity,principle of co-relation coefficient?

3 6265

how can we determine RRF value in HPLC FOR CALCULATION OF IMPURITY ?

Macleods,

4 40155

In UV we measure absorbance , how it is happend ? explain me

4 7228

why we are performing residue on ignition?

6 13921




why we are performing residue on ignition?

2 6899

NMR is both qualitative and quantitative?EXPLAIN

2 4283

why buffer is added in solvent system in HPLC ??

Lupin,

10 11668

how can we calculate void volume?give its importance in brief

Natco,

1 7012

What is the function of end capped column?

Cipla,

5 27617

HOW TO CALCULATE THE MASS OF UNKNOWN IMPURITY IN LC-MS? AND WHAT IS THE ROLE OF FRAGMENTATION IN LC-MS ?

1 4130

how calculate column dead volume in hplc ?

Torrent Pharma,

3 16793


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Un-Answered Questions { Analytical Chemistry }

What is control room temperature and which guide line says?

347


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

193


I have compare C2H2-air and C2H2-N2O flame AAS on determination calcium. Both use same range of std to plot calibration curve. (2-6ppm) When i measure the sample with phosphate, KCl and LaCl, C2H2-N2O flame give false positive result, around 0.5ppm. When i measure the sample with phosphste, KCl and EDTA. C2H2-N2O flame also give 0.5ppm false positive. But both above mentioned sample would not give false positive when measured by C2H2-air flame. What is the reason?

2054


What is intact assay method development.....?

1119


WHY given much noise PDA dector then VWD Dector

665






In performance Check of GC Why Hexadecane Peak is Considered 

1770


how to get accurate result for Residue on evaporation in purified water

280


Why perchloric acid used for potentiometric titration

1292


how a particular wavelength can be different for a particular compund while analysing by uv and by HPLC.

1096


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.

1609


Tell me something about Vitamin A test method by HPLC

1337


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

678


what is partion and column chromatography

1034


What is the calibration of uv process and preparation

697


calibrtion procedue of LC-MS

1268