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.

1675

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 5691

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

Mylan,

3 10349




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 3230

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 3127

iam usig ph buffers merk. manually how to prepare ?

1032

Sulphated Ash incresed it will effect on product yield?

Biocon, Lupin,

3 2473

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

Biocon,

1 9696




difference between selectivity and specificity

Troikaa Pharmaceuticals,

2 10152

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,

830

differnc btw c18 and c-8 column

Cipla,

3 9517

use of stry light

1 4915

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

3 4449

what is motor rotation in case of sucrose

1 1846

why equlirium conatant of water have 14 value

GVK Biosciences,

960


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Un-Answered Questions { Analytical Chemistry }

mode of absorption in alimentary canal?

1205


4. Describe the operation of the Craig apparatus. Chapter.3 Equilibrium Processes in Separations

1336


For titration in anhydrous media with perchloric acide, if lack of titrator, Which indicator is been used for replacement. How calculate pH of test solution to choose suitable indicator?

937


How we can determine water content in piperazine

943


what is peak purity and its formula

263






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.

830


what is the extinction coefficient for Indomethacin or at 319nm wave length.

2625


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

764


Which products will produce when acetic anhydride reacts with Ter-butanol, Sec-butanol, Iso butanol, Dimethylamine etc.

1483


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

8616


What is the formula to determine the concentration of M of a solution given the % transmittance? Use %T = 43.7 as an example.

1373


what is the principle involved in turbidometry and nephelometry ?

2580


function of detecter in hplc ,gc and spectroscopy? function of carrier gas in gc?

1250


How can I develope method of dissolution by HPLC OR UV

1021


why octanol used to determine the partition coefficient ?

1029