Analytical Chemistry Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Analytical Chemistry Interview Questions

Questions Answers Views Company eMail

IN pH CALIBRATION,CALIBRATION IS DONE FOR pH METER OR ELECTRODE?HOW WILL YOU JUDGE THAT THE METER TO BE CALIBRATED WITH 4,7,9.2 BUFFERS?EXPLAIN TEMPERATURE EFFECTS ON pH.

Aurobindo,

1 11051

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

2056

What is a base line?

2 11353

what is differance between density and specificgravaty

Neuland,

2 11748

what is defferance between dipolemoment and polarity

Neuland,

1 8252

In standard weight box used for calibration of analytical balance there are two numbers (Qty) of 20mg, 200mg,2.oGM weights. Why?

Orchid,

2 16038

WHAT IS USE OF ION PAIR REAGENTS?

3 10463

How to calculate signal to noise ratio by this formula 2H/h where h from where and how to measure

2 10594

How to choose the which salt is suitable for mobilephase

Cipla, Ranbaxy,

3250

What is quality controle.

6 11786

What is Standard deviation

Cipla,

2 12149

When you get Moisture content by KF higher than by LOD, what does this indicate?

7 18169

what is deference b/w the working standard and reference standard

4 27584

How do we fix the sample concentaryion in hplc method development. what is the basis?Thanks in advance

DRL, Glenmark, Orchid,

4 20960

Suppose we prepared pH buffer solution in lab.and calibrate against NIST solution, and same shall going to used upto 30 days. is it possible to stable pH and apperance ? suggest ?

Orchid,

1 6068

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Un-Answered Questions { Analytical Chemistry }

can we use the same detector in HPLC as well GC and what could be the differences we can find in the final chromato graph in any aspects?

2183

WHY pKa value is more important than pH value of the mobile phase in HPLC?

1769

why we use glass fiber filters use in some situation?

800

What is column in chromatography?

2238

about method developement in hplc

1721

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

2300

How much is the standard area for glc analysis

2286

If combination product how require to identify which imp is of which api?

839

mode of absorption in alimentary canal?

2392

Why only Copper standard is used to calibrate Atomic Absorption spectrophotometer?

2728

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

1691

Ph meter can show more than 14 ph reading? Why ph range in between 1 to 14 only?

741

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

1648

how can I make the copper get white bye any salt or acit?

2210

in which situation require to use paddle and basket?

741

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