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Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

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.

2352

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 6932

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

Mylan,

3 12609

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 4549

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 4126

iam usig ph buffers merk. manually how to prepare ?

1568

Sulphated Ash incresed it will effect on product yield?

Biocon, Lupin,

3 4223

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

Biocon,

1 12894

difference between selectivity and specificity

Troikaa Pharmaceuticals,

2 11683

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,

1341

differnc btw c18 and c-8 column

Cipla,

3 11403

use of stry light

1 5931

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

3 5894

what is motor rotation in case of sucrose

1 2818

why equlirium conatant of water have 14 value

GVK Biosciences,

1613


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Un-Answered Questions { Analytical Chemistry }

analytical method validation require to with respect to release specification or shelf life specification?

109


identification is for unknown? qualification for known? reporting for LOQ?

77


which are the diffrent batches in the pharmaceuticals?

136


what is diffrence between shelf life and expiry date?

107


How can we confirm the HPLC column is end-capped or not? Is it possible to identify by physical appearance?

2533






Which are the diffrent grades of api in pharma?

106


Why irmoisture balance is used for corrugated box moisture testing

1737


what is biorelivent dissolution media?

98


In GC calibration,what is the procedure to calibrate the TCD (thermal counductivity detector)suggest ?

2545


what are the guidelines for analytical method validations?

221


How to calculation of residual solvent methanol (3000 ppm) standard solution, and how many quantity used of test sample

2132


what is impurity profile. how to interpret this impurity profile to a drug product or drug substance.

1938


How you develop a method in HPLC?

1912


how decide the clining method and cleaning method validation require for this perticular products?

97


CAN WE DETERMINE THE PEAK PURITY IN GAS CHROMATOGRAPHY ANALYSIS?

496