Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

How can you prepare 0.1% Phosphate buffer solution?

6 12326

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

Police Constable,

1 2399

difference between quality and quantity

3 11691

why we get only one peak in assay by hplc but in rs by hplc get more peaks

MSN Pharma,

1 10710

In performance Check of GC Why Hexadecane Peak is Considered 

Asian Paints, MSN Pharma,

2561

Is it required to inject 6 injections for % RSD of a system suitability in lc or gc

Raks Pharma,

3 12191

Why do we use KCl ,K2Cr207,Toulene & Halonium oxide for the caliberation of UV

Apotex,

2 15306

what is rt and rrt? how we find rrt? relation between rt and rrt/

Cadila,

1 17235

why the ph scale range is 1 t0 14 and why not beyond 14 and not to below 1?

Avra, Granules, Orchid,

5 20160

What is method validation in quality control

Alchem,

1 4097

Why we use uracil and caffeine in hplc calibration

Alchem, Reddy Labs,

6 27667

If mass balance is not passing in forced degradation in method validation that method is suitable or not?

Aurobindo, Dr Reddys, Reddy Labs, Wockhardt,

1 7995

Why we compare unequal concentrated solutions in heavy metals test. For example comparing the test solution with 1 ppm lead standard and telling it's less than 20ppm?

Micro Labs, Mistair,

1 7020

What is the reason for negative peak in HPLC while using UV detector.

2 14765

What is the reason of RT change in new column v/s old column in HPLC

Apex,

3 16712


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Un-Answered Questions { Analytical Chemistry }

How we can identify process related and degradation impurity in single method with short period?

340


How they found 1mL of K.F reagent is equivalent to 5mg of water and if we change the composition of K.F reagent, is it can neutralize more amount of water?

1311


Which products will produce when acetic anhydride reacts with Ter-butanol, Sec-butanol, Iso butanol, Dimethylamine etc.

2398


How require to develop GC method? how to select diluent, GAS, column selection and other chromatographic conditions?

283


What is the main difference between ODS1 and ODS2 Hplc column.

4480






why we should take dst factor for below 1%moisture samples

2205


how require to interprit the method precision data of hptlc?

301


Why six unit used for precision?

811


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

8928


effect of pore size, pore volume, partical size, column length, carbon load on retention time? what is carbon load? what is the use?

334


Why we select scan range from higer wavelength to lower wavelength in uv visible spectroscopy and ftir spectroscopy ? .

464


how you establish the LOQ?

315


What is the diference between residual solvents and organic volatile matter

1502


Why only hydroxy naphthol blue indicator is used for standardisation of 0.05M EDTA solution instead of solochrome Black T or Euriochrome Black T indicator which is used for all sample analysis with 0.05M EDTA solution?

2218


CAN WE DETERMINE THE PEAK PURITY IN GAS CHROMATOGRAPHY ANALYSIS?

711