Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

How to calculate the signal to noise ratio.

Rakshit Drugs,

1 6818

Why pH range is 1-14 nt more than 14???

IPCA, Lincoln Pharmaceuticals,

3 8274

Weight balance variation limit during analysis

Amneal Pharmaceuticals,

7 8923

How to calculate lamp energy in hplc?

1 3438

Difference between related substances & impurities

Biocon,

2 17489

Polarized meter calibration, 1. Method name? 2. Which solution use? 3.why?

1 3289

Basic principle of ESI?

Cipla, GVK,

1780

What is the meaning of Base deactivated vials

Sun Pharma,

1 2988

What is definition of RRT and what is the difference between RT and RRT in HPLC

2 9340

What is the definition of RRF

2 6083

In GC Why does retention time decrease when temperature increases? Also how does a change in temperature effect selectivity?

Gland Pharma,

1 3307

why we use 0.1% acetone in gradient calibration of HPLC?

Cipla, Dr Reddys, FDC,

3 12812

What is difference between assay by Hplc and uv

Aizant, Fredun Pharmaceuticals, Hetero, Marksans Pharma,

2 9566

why we use actone for Gpv test in hplc calibration

1 9623

How to standardization of 1N H2SO4?

GNFC, Macleods,

1 7298


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Un-Answered Questions { Analytical Chemistry }

why salisylic acid not using now days for disdolution calibration?

411


How you develop a method in HPLC?

2207


please explian me about area normalisation method,diluted standard method,impurity vs impurity and which one has to be selected in method development

1254


what is the extinction coefficient for Indomethacin or at 319nm wave length.

3635


if your impurity coeluting with each other in that situation how require to set specification? is it acceptable?

516






Which parameter require to do for analytical method equivalency?

429


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.

1659


how you start the solubility study?

468


Qc interview questions

1377


What is control room temperature and which guide line says?

1273


how you fix the limits of impurities?

503


how you determine moist.of NaOH sol or NaOH flacks

1888


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

2345


which one is better separation in high pressure liquide chromatogram orlowpressure chromato gram in hplc

1834


how to select short coloum and long coloumn for new molecule

1942