Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

about analytical chemistry

Apotex,

668

What is differences between normality and molarity.in which cases both are used?

GVK,

1 4201

in gas chromatography what is the difference between gas flow rate and average linear velocity ?

USV,

927




what are the ideal conditions for coloumn storage

Srikem Laboratories, Claris Lifesciences,

2 3463

i want to know about headspace and interview question on headspace

Srikem Laboratories,

1 2792

class of solvent regarding Residual solvent e.g. Acetone his class

1 1823

why we multiply 1000 in the determination of kf factor ?

Stellence Pharm Science,

3 4272

why we measure PH of a solution in PH only why not POH ?

Stellence Pharm Science,

1 2076




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

1286

Through assay by hplc(anhydrous basis) product got 100.8% .How much the potency of that product.Moisture content is 1.7%,Sulfated ash is 0.02%,Total impurities are 0.3%

2 3315

Why pyrene is also use for calibration if detector

Cipla, Dr Reddys,

1 1932

what is difference in ods I ods II is this is realy from sorbent / packing characteristics or from other means

Sandoz,

623

In gas chromatographic analysis sometimes we use headspace, why it is required instead of manually injection?

1 2401

How to fix the sample concentration in related substances development.

Novartis, Watson Pharmaceuticals,

2 3956

Who discovered X-ray

Huntsman Corporation,

2 2280


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Un-Answered Questions { Analytical Chemistry }

What are the primary considerations in extractables and Leachables ?

927


why equlirium conatant of water have 14 value

838


why glutent are detected in the rice cereal baby food product even manufacturer claimed that they are using rice and milk only?we have using ELISA to do the test,and rice supposed not containing any glutent,rite?We already repeat the test so many times and it still detected.just wondering where the glutent came from?

1169


wat is the role of michelson interferometer in FTIR and He-Ne lase.detailed answer required in simple language

990


USP methodology, EP methodology, IP methodology, among three if possible to use one methodology for qualify working standard to use USP, EP, IP ? Please explain...

471






Please tell me about the pH of Polycaboxylic ether is it in the 5-6 range ever or more than 6

1240


how much mass should be there in volumetric flask while in preparation of sample for assay? 

1063


acceptance criteria for lod & loq by standard deviation of response and slope??

1077


What is Band broading effect explain

476


give clarity of linearity and range in method validation

857


EXPLAIN THE CALCULATION PART OF AN KF TITRATOR CALIBRATION WITH SUITABLE EXAMPLE

1234


Which is the highly polar and highly non polar column in HPLC?

694


How to determine water content of bis tetrazole amine mono ammonium salt

1792


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

577


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

752