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.

1609

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 5542

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

Mylan,

3 10069




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 3044

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 3037

iam usig ph buffers merk. manually how to prepare ?

987

Sulphated Ash incresed it will effect on product yield?

Biocon, Lupin,

3 2338

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

Biocon,

1 9274




difference between selectivity and specificity

Troikaa Pharmaceuticals,

2 9959

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,

775

differnc btw c18 and c-8 column

Cipla,

3 9351

use of stry light

1 4809

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

3 4334

what is motor rotation in case of sucrose

1 1765

why equlirium conatant of water have 14 value

GVK Biosciences,

909


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Un-Answered Questions { Analytical Chemistry }

Why irmoisture balance is used for corrugated box moisture testing

1058


Why do we use KMnO4 in the test of control of obsorbance ? and why do we take specific quantity i.e 57-63mg?

1301


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

713


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?

913


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

984






IS THERE ANY EQUIPMENT TO CHECK AND CALCULATE THE POLARITY OF A LIQUID?

1225


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

2563


what is peak purity and its formula

198


how much mass should be there in volumetric flask while in preparation of sample for assay? 

1162


Principle of single pan analytical balance

3657


What is the calibration of uv process and preparation

697


EXPLAIN THE CALCULATION PART OF AN KF TITRATOR CALIBRATION WITH SUITABLE EXAMPLE

1325


what is the structure of DOWEX-50

3688


Why potassium dichromate is used in calibration of uv?

291


WHICH STANDARD WE USE IN SILICA ANALYSIS IN SILICA-GEL METHOD FOR SOLID SAMPLE

863