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 10351

what is the cleaning validation?

BioPlus,

1 8809

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

AVT, Hetero,

3 10308

What is polymorphism?which type of compounds exhibits polymorphism?

Torrent Pharma,

2 8520

what is the basic principle of conductivity meter

Hetero,

4 27783

Column selection in HPLC method development?

1 12140

How to prepare ppm solution of Nacl form its salt?

5 66366

what is mean by assay?

6 19455

why we are doing seal wash and needle wash?

3 14726

which functional group we can detect in IR?

3 10762

what is mean by UOD?

2 9768

what is mean by content uniformity?

5 9168

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

3 9218

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

1 7374

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

Strides,

4 9837


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Un-Answered Questions { Analytical Chemistry }

What if impurity area in control sample coming more as compared to LOQ level of impurity ?

1112


how require to fix the linearity and accuracy cincentration range?

594


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?

1422


in which situation require to take incident in validation?

710


How can we calculate "confidence interval" in analytical method validation? Pl. explain with example.

3552






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

2546


In the isomers,enantiomers give the only physical properties present such that no chemical properties present.

1754


how to select short coloum and long coloumn for new molecule

1797


We use hicrome 10 cxs column in hplc analysis....pls tell me.. what is the meaning of 10 cxs?

1123


What is the formula for relative diffrence for standard solution in solution stability in validation?

284


what is the principle of UV Vis spectroscopy, AAS, ICP OES,ICPAES, ICP-MS and FTIR

8368


Why dissolution test is not performed in all of the products

2007


why holium oxide prepared in 10% HCLO4 SOLUTION

967


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.

1487


How to set analytical specification for combination products?

303