Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

about analytical chemistry

Apotex,

722

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

GVK,

1 4445

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

USV,

990




what are the ideal conditions for coloumn storage

Srikem Laboratories, Claris Lifesciences,

2 3652

i want to know about headspace and interview question on headspace

Srikem Laboratories,

1 2985

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

1 1965

why we multiply 1000 in the determination of kf factor ?

Stellence Pharm Science,

3 4567

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

Stellence Pharm Science,

1 2256




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

1417

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 3487

Why pyrene is also use for calibration if detector

Cipla, Dr Reddys,

1 2050

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

Sandoz,

679

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

1 2534

How to fix the sample concentration in related substances development.

Novartis, Watson Pharmaceuticals,

3 4634

Who discovered X-ray

Huntsman Corporation,

2 2460


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Un-Answered Questions { Analytical Chemistry }

How can we confirm the HPLC column is end-capped or not? Is it possible to identify by physical appearance?

1821


how to selecet an exact coloumn for an new molecule development by hplc how to select exact salt as buffer for new molecule development by hplc what is the the process to select the mode of saparation of compoundes by hplc what is the use of ph of buffer what is use of buffer,ph,organic phase,ans methods how the molecules get saparated in coloumn,

1118


what is peak purity and its formula

181


we are performed SOR for a particular product the limit is -6 to -10.We face particular bathes it is not meeting the specification.we performed diffrent instrument diffrent analyst we are getting diffrent diffrent results.solvent is dimethyl sulfoxide what could be the reasion

455


What is viod volume and peak purity in HPLC?

1329






process of Diclofenac sodium,IP.

859


What is diffrence between extractable volume and deliverable volume? Answer pls

735


what type of questions asked on analytical balance and also give answers................all pharma companies?

5965


what is the purge flow & how to calculate

1159


Can we interpret accuracy from linearity in method validation?

733


what is the limit for KF Factor ,we take factor using water we will found factor between 6 to 7 ,while on KF Reagent bottle mentioned 5 mg/ml water content.if we not use dried methanol it is effect on factor.

684


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

679


What is column in chromatography?

777


what is partion and column chromatography

1025


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

2472