Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

What is mean by peak tailing in case of GC?

5 10991

why we are taking 85 ml of concentrated HCl to prepare 1N Solution

SG Phyto Pharma,

4 103442

What is diffrence between residue on ignition and sulphated ash?

Zydus Cadila, Cadila, Piramal Healthcare, Panas Pharmaceuticals, Remidex, Aurobindo, Dr Reddys, Mylan,

37 150130




how can standardized of HCl of 0.1 N

7 38797

What is the difference b/w OVI Solvents and Residual Solvents in case of Gas Chromatogaphy and What is its Detection Limit?

Jubilant Organosys, Suven Life Sciences,

8 29780

what is the diffrence between absorbance and absorption in the beer,s lamber formula ?

2 8182

one gram of which below elements has the most atoms in its? a) H b) D C)T D) He

4 3898

0.1 atom gram of the unknown element( X)reacts with 2.4 gram of O2 to produce the oxid product . can you tell us, what is the oxid formula ? a) XO b)X2O3 c)XO2 D) X2O4

Ajanta,

1 2008




Why we use Uracil for HPLC calibration in Detector wave ength accuracy test?

5 19679

k.f principle in finding out moisture content

1 11025

What is difference btw UV detector & RID detector

4 14624

What's the importance of these procedures?

1 3152

How precise should be the linearity in HPLC method validation?

Glenmark,

3 7586

what should be the precision during technology transfer?

Glenmark,

3 6010

why we use vanillin in melting range calibration

3 9737


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Un-Answered Questions { Analytical Chemistry }

in sampling of raw material which side is pasted sampled labels

11


2. Two grams of Benzoic acid are dissolved in 200 ml of water and extracted with 200 ml of diethyl ether. The distribution coefficient of benzoic acid is 100, and its dissociation constant is 6.5 10-5. Calculate the distribution ratio (D) of benzoic acid at pH 2, 5, and 6. 3. Calculate D at pH 2 to 10 (1 unit apart) in the above problem, and plot D versus pH.

950


How to compare XRD graphs against standard and carry polymorpism study of API's by powder XRD method?

2647


Why irmoisture balance is used for corrugated box moisture testing

1150


Basic principle of ESI?

907








1123


Tell me something about Vitamin A test method by HPLC

1428


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

151


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

753


about method developement in hplc

456


are there in uv lamb that is chractrestic for wavelenghth 205 nm ?????

785


In BP2013, Loperamid HCl monograph. Assay by titration with 0.1N sodium hydroxide using hydrocloric acid 0.01N and reading the volume added between the 2 points of inflexion. I have a question that if the diluent solvent is ethanol is certainly consumed a amount of volume of titrant, so this volume must be eliminated on the result calculation or not apart from first point which is subtracted above.

1698


Principle of single pan analytical balance

3787


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.

1095


in gas chromatography what is the difference between gas flow rate and average linear velocity ?

1077