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Analytical Chemistry Interview Questions
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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.

1968

If i performing one analysis on C8column then the same analysis done on C18 column then what will happen about Rt;Resulution;Peak shape Explain ?

1 6349

what is peak purity? how may types of methods to determine peak purity?

Mylan,

3 11593

why using Potentometry What Purpose? differance between manual and potentiometry? why using Some of materials in usig potentiometry? What is use of mericuric acetate in Potentiometry

Biocon,

1 3939

iam using ph instrument lab india make.3ponit and 5point.in calibration time 3point slope will come 98.89and 96.87.that limit is 85 to 105.what basis slope will come.any calucalation between them.5point wiicome slope 99.89?why 3p0int came 2 values

1 3564

iam usig ph buffers merk. manually how to prepare ?

1246

Sulphated Ash incresed it will effect on product yield?

Biocon, Lupin,

3 3267

in loss on drying Why follows on constant weight not more than 0.5 mg, any region

Biocon,

1 11825

difference between selectivity and specificity

Troikaa Pharmaceuticals,

2 11012

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.

ABC,

1055

differnc btw c18 and c-8 column

Cipla,

3 10397

use of stry light

1 5439

when we have polar type of sample and solvnt hen which type of stationry phase we have to use

3 5069

what is motor rotation in case of sucrose

1 2325

why equlirium conatant of water have 14 value

GVK Biosciences,

1226


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Un-Answered Questions { Analytical Chemistry }

why octanol used to determine the partition coefficient ?

1345


What is importance of pH in the Heavy metal test and How it effect on the test results?

1280


WHAT IS DIFFERENCE B/W MALTINGRANG/DSC

1457


What is viod volume and peak purity in HPLC?

1761


why equlirium conatant of water have 14 value

1226






How to know the estimated LOQ concentration in ppm

194


What is control room temperature and which guide line says?

671


What is the exact reason to use THF and IPA in buffers of Reverse phase HPLC as a solvent?

2990


What is third generation HPLC Columns?

1040


What is the difference between spectro meter and spectro photo meter?

9268


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

994


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

1001


Why perchloric acid used for potentiometric titration

1642


How do we fix the sample concentaryion in hplc method development?

161


In rs method development when we are going area normalization method to dilute standard method?

235