Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

perchloric acid&glacal acetic acid both are acids but reaction is complete in volumetric titrations.how?

1 8196

what is the cleaning validation?

BioPlus,

1 7160

acetic acid is weak acid & perchloric acid is strong acid.but how perchloric acid is soluble in acetic acid

AVT, Hetero,

3 7766




What is polymorphism?which type of compounds exhibits polymorphism?

Torrent Pharma,

2 6606

what is the basic principle of conductivity meter

Hetero,

4 23207

Column selection in HPLC method development?

1 9439

How to prepare ppm solution of Nacl form its salt?

5 53405

what is mean by assay?

6 15664




why we are doing seal wash and needle wash?

3 11147

which functional group we can detect in IR?

3 8394

what is mean by UOD?

2 6998

what is mean by content uniformity?

5 6331

today i am doing calibration of HPLC. when i inject the blank it was going on -ve.(bleow then zero) why?

3 7168

what are the sources in ELSD,PDA, RI and UV Detectors?

1 6056

in karl fischer reagent which solvent is used for dissolving iodine sulphur dioxide and imidazole

Strides,

4 7324


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Un-Answered Questions { Analytical Chemistry }

How can we calculate offset value pH measurment

258


How to do regeneration of Metacarb Pb plus column?

1316


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

1268


What is the difference between purge septum flow and column flow in gas chromatography?

838


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

1969






what is the importance of peak purity in HPLC and how we can calculate through manul(not software)?

3149


What should be the level/ Percentage of Arsenic in Arsenic free zinc.

1082


1)What's the meaning of Absorption,give a example. 2)What's the meaning of Adsorption,give a example. 2)what is the difference between Absorption and Adsorption.

1217


Which type of column should i use to check the purity of high molecular weight protein using HPLC reverse phase column chromatography? Hi everyone. I wanna to check the purity of high molecular weight protein (collagen) with MW of ~130 kDa using a HPLC. I know C18

713


Why we used in n-butyl acetate water content terminology while in ethyl acetate we used moisture content terminology?

604


what is third integration

759


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

1006


how will you do the prep for unstable componds?

713


In Dissolution Test why limit is define Q+5% what is the role of +5%.

1565


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

2567