Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

What is the defination of Bulk density?

Dr Reddys,

4 11094

What is the Defination of Tapdensity ?

Dr Reddys, R L Fine Chem,

4 8929

What is the formula for Tapdensity /

Dr Reddys, GR Intrachem,

6 11793




Why use in sodium salicylate in uv lamps calibration

Reddy Labs, Auctus Pharma,

1 4487

Why using Holmium oxide in UV calibration

Orchid, Dr Reddys, Matrix, Nakoda Chemicals,

8 33361

Why we are performing wavelength accuracy at lower and higher wavelengths in HPLC calibration

3 9439

How to fix the concentration for RS by HPLC

Reddy Labs, Intas,

8 30223

what is the definition of Precision.

Cipla,

4 7361




what is the identification test of volatile substance? what is volatile compound?

1 1192

what is differance between volatile and non volatile compound expalin by exaple

2 12494

Why do we use 500ppb sucrose and 500ppb 1,4 benzoquinone in TOC calibration?

1 2101

In the test for control of absorbance in UV calibration why do we use only potassium dichromate and what is purpose of taking a specified amount of 57.0-63.0mg?

Cipla, FDC, Aurobindo,

8 48338

In the test for control of absorbance in UV calibration why do we use only potassium dichromate and what is purpose of taking a specified amount of 57.0-63.0mg?

Reddy Labs,

1 7400

Why do we use 500ppb sucrose and 500ppb 1,4 benzoquinone in TOC calibration?

5 16399

what is the use of performing tapped density in pharmaceutical industry

1 8313


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Un-Answered Questions { Analytical Chemistry }

What is the formula to determine the concentration of M of a solution given the % transmittance? Use %T = 43.7 as an example.

1389


What is third generation HPLC Columns?

783


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

3686


In Dissolution Test why limit is define Q+5% what is the role of +5%.

1617


Colorimtry

293






WHAT IS THE USE OF STARTER ?????????

1152


Why sodium hydroxide used for maintain pH of phosphate buffer

1022


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

299


WHAT IS THE CRITERIA FOR SELECTION OF TIME OF DISSOLUTION AND THE MEDIUM OF DISSOLUTION?

1447


when we talk about change in entropy we consider total entropy means of surround +entropy of system but when we talk about change in Gibss free energy we consider entropy of system.explain with reason.

847


why should we perform dissolution PVT calibration only by UV spectrometer, not by HPLC ?

438


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

732


in dissolution why pool sample needed? in which type of drug pool sample need?

1898


why are measure gas flow " ml " in Gas chromatography

447


what is procedure of actual procedure for registration of drug?

721