Analytical Chemistry Interview Questions
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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 7976

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

756

What is a base line?

2 7682




what is differance between density and specificgravaty

Neuland,

2 7887

what is defferance between dipolemoment and polarity

Neuland,

1 5399

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

Orchid,

2 10231

WHAT IS USE OF ION PAIR REAGENTS?

3 6067

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

1 5789




How to choose the which salt is suitable for mobilephase

Ranbaxy, Cipla,

1565

What is quality controle.

6 6891

What is Standard deviation

Cipla,

2 7939

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

6 9895

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

3 15428

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

Orchid,

3 11691

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 3820


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Un-Answered Questions { Analytical Chemistry }

Why sometime potassium ortho phosphate mix with acetone use for sample preparation for hplc

169


what is the structure of DOWEX-50

3490


how can delete the impurity in 1-(2:6 dichloro phenyl)-2-indolenone.and desolving the impurity in which solvent but does not desolve product in solvent.

1102


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

756


what is separation techniques.

1269






How can we determine Moisture content of HI?

969


What is the calibration of uv process and preparation

593


Identify problem faced when mass spectroscopy is used with HPLC system ?

611


How we performed the force degradation for drug substance, is any specific guideline is available for each parameter(Acidic, basic, oxidation,heat)? what conditions you mentained for above parameters.

927


what is different when impergnated silica plates are used in separation of azo dyes using column chromatography?

605


why equlirium conatant of water have 14 value

841


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?

881


What is aggregate and fragments in SEC?

550


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

1139


why octanol used to determine the partition coefficient ?

896