Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

what is the defination of calibration & verification?

Divis Laboratories,

9 22211

what is specificity?

Amneal Pharmaceuticals, Aurobindo,

4 9492

why we use only vanilline , acetanilide,& caffeine For the Calibration of melting point appartus?

Reddy Labs,

7 22186

who is the father modern liqiud chromatogrphy?

Cipla, Amneal Pharmaceuticals, Car Chem,

3 9976

what is the meaning of ventillation in HPLC?

Amneal Pharmaceuticals,

3 10307

which solvent is highest poler acetonitrile dimethyl formamide methanole tetrahydrofurane buffer solution

8 9891

what is the difference betwen the analytical column & peparative column?

4 10947

why we conclude the area% for the chromatographic purity?

Lupin, Amneal Pharmaceuticals,

1 5346

what is the general mechanism of high performance liqiud chromatography?

Amneal Pharmaceuticals, Ajanta Pharma,

7 13151

why 2Theta value is consider in the XRPD spectra and how to consider the 2 Theta value

2 5983

why we wre doing linearity siudiec in hplc method validation


3 18999

what does optical rotation and specific rotataion means,difference between them

Neuland, CPL,

8 26890

what is regration method in method validation , how we can calculate it.

Sun Pharma, Cipla,

3 8533

viod volume and dead time

Oxygen Healthcare,

7 14675

i want model written test paper for the post of analyst in IOCL(indian oil corporation ltd) any one pls help me


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Un-Answered Questions { Analytical Chemistry }

In HPLC calibration, caffeine is used as primary standard for wave length calibration due to caffeine is having dual maxima at 273 & 205 nm and one minima at 245 nm. Any body can give reference of these details from any pharmacopeia (with chapter no.) or any other authentic guideline?


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


calibrtion procedue of LC-MS


Why Ethanol is Used for Standardization of GC Head space?


Why sodium hydroxide used for maintain pH of phosphate buffer


How to determine the EDTA content by potentiometry titration in Ceftriaxine sodium


What are modes of quantification in related substances


why we are using benzene, anyline in acetic anhdride assay titration method?


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.


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


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


Principle of single pan analytical balance


mode of absorption in alimentary canal?


mahagenco syllabus for the post of chemist


in sampling of raw material which side is pasted sampled labels