Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

what is dwell volume in HPLC?

Aurobindo, Sun Pharma, SUN, Cadila, Strides,

2 3783

what does pH stand for?

Orchid,

4 3875

Definition of beers_ lamberts law

Agio Pharmaceuticals, Aarti Industries, Emcure, Supriya Lifescience,

4 2993




Why monograph of hplc coming upperside of drift but in IR monograph coming in drift side?

1 1723

Why a1% value is used for some product ? What is the criteria for selection a1% value ?

Zim Laboratories,

848

Why the ph limit (1_14) Is used?

Cipla,

2 3956

What is cut off value of solvent used in hplc

Pfizer,

1 2984

How to calculate mass balance in RS after degradation

Reddy Labs,

1 2162




if out of two set of results of moisture analysis first 1 is passing, second one is failing, is it oos ? or vice a versa first 1 is failing and second one is passing. for information mean value to be reported and in mean value the substance is ppassing, is it oos or normaal mean value to be considered?

JBCPL,

1 1359

Can we interpret accuracy from linearity in method validation?

Lupin, Dr Reddys,

669

What is aggregate and fragments in SEC?

550

how pyridine can be analysed other than GC?

1 1828

What is the calibration of uv process and preparation

Aurobindo,

593

How to prepare 1000ppm methylene blue solution

2 2662

Identify problem faced when mass spectroscopy is used with HPLC system ?

College School Exams Tests,

611


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Un-Answered Questions { Analytical Chemistry }

why should we perform dissolution PVT calibration only by UV spectrometer, not by HPLC ?

290


Identify problem faced when mass spectroscopy is used with HPLC system ?

611


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

1213


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.

980


How can we determine Moisture content of HI?

969






How to choose concentration of LOQ solutions for RS analysis? Example.

660


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

952


What is intact assay method development.....?

1022


Principle of single pan analytical balance

3490


what is the identification test of volatile substance? what is volatile compound?

895


During Validation study, Recovery is passing at all levels but Linearity is failing. Justify?

1346


What is the calibration of uv process and preparation

593


cefoperozone and sulbactam inj. hplc test method

1201


While performing TOC sst analysis Zero shift disabled & sample analysis zero shift enabled why?

857


WHY given much noise PDA dector then VWD Dector

586