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 burette calibration of Karl fischer Instrument, the multiplication factor 1.00693 is using for how much ml of water dispenced. why

1 4417

how can we decide the limit of cleaning validation? What is the criteria for it?

Glenmark,

2 13703

What is difference between Related Substance & Impurity Profile?

Jubilant Organosys,

2 51791

Why we are injecting low load standard conc. while analysing Related Substances by HPLC?

3 11250

why wetlab is called as wetlab

6 17909

In UV-VIS spectrophotometer:My diluent is methanol even though i corrected base line for methanol,In my sample scan i found methanol peak.what is the reason?

2 10256

What is the diffrence between the performing of LOD ordinary drying at voven and vaccum method.

Apex,

4 10900

How can we calibrate the burette dispencing capacity in metrorm kf titration calibration

1 6861

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

2300

in hplc calibration we are using 0.05% acetone why we are using that one and what happen when its conc increases or decreases

Aurobindo, Cadila, Martin,

4 32116

loss on drying we applied vaccum for some compounds and some compounds are at 105c why

3 12493

why we are calibrating autopolarimeter with quartz control plates

1 5841

what is the different in Total ash, sulphated ash, acid insoluble ash, alcoholic or non alcoholic ash?

GHI, Siemens,

10001

why we use TLC?

8 22132

why disodium tartarate is used for autotitrator calibration

Cipla, Micro Labs,

2 13426

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Un-Answered Questions { Analytical Chemistry }

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

Why are use silicon oil mr?

1204

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

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

3104

could negative ions be produced by bombardment process in mass spectrometry?

1781

what is mean by 40 in the dissolution basket mesh size?

787

What is the accrptance criteria in RSD for RS method precision on basis of impurity percentages?

825

What is the acceptance criteria for moisture balance when calibrated with sodium sulfate

2039

What is gelatinization?

1618

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

734

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

1870

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

5237

How can we calculate "confidence interval" in analytical method validation? Pl. explain with example.

4268

why does used dry caffien in HPLC calibration?

2032

How to choose the which salt is suitable for mobilephase

3250

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