Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

if v use HELIUM & ARGON instead of NITROGEN as a mobile phase what happen in GC SYSTEM ?

Cipla, Reddy Labs,

5 8527

what is relationship between absorption and transmittance in u.v.?

Orchid,

11 22565

why we are using polystyrene film for calibration of I.R spectroscopy?

Abbott, Reddy Labs, Veritas, Intas, Zydus Cadila, Andhra Organics, RRR, Kemwel,

12 49472




why we cannot analysis below 200nm in u.v?

2 11148

what split ratio in gas chromatography.

Cipla, Glochem,

9 36470

significane of detector wavelength accrucy in calibration of hplc

1 4082

signifcance of detector lenearity in calibration f hplc

3 5413

injection volume accruacy test i calibration of hplc

HLL,

3 12299




verification of wave number why you are use in IR calibration

2 5107

control of resolution in calibration of IR

3 6450

defination of wavelength & wave number

4 9530

what is LC - MS ? What its wide use in cro/pharmaceutical Industry

Ranbaxy,

4 7013

what is difference between IR & FTIR ? how we calibarte both ? I want to know the procedure.

Cadila,

7 82592

which brands HPLC COLUMN available in market

11 14053

calibrtion procedue of LC-MS

GVK, Matrix,

1319


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Un-Answered Questions { Analytical Chemistry }

How to determine the EDTA content by potentiometry titration in Ceftriaxine sodium

1154


using gradient pressure in gas chromatography are not ?using gradient pressure why

2167


What are modes of quantification in related substances

943


in dissolution in one tablets two molecule one is losartan & second is HCTZ losartam is complies in s1 stage & hctz is complies in s2 stage then how to report result losartan s1 stage result or losartan s2 stage result

954


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

334






why we use a particular hplc column for a particular compound give reasons?please

1562


why are measure gas flow " ml " in Gas chromatography

426


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

1336


Why sodium hydroxide used for maintain pH of phosphate buffer

1003


AT WHAT CONDITIONS WILL YOU ANALYSE A SAMPLE,WHICH ARE PRESERVED AT OTHER THAN THE AMBIENT CONDITIONS?(ie COLD STORAGE SAMPLES BELOW 20* CENTIGRADE?

894


Why potassium dichromate is used in calibration of uv?

380


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.

1675


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

1082


What is importance of pH in the Heavy metal test and How it effect on the test results?

1006


why sre you used Potassium hydrogen phthalate in standarisation of 1N NaOH and 0.1 N Perchloric Acid?

7005