Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

One Raw material failed assay test is there any chance for failing purity of that material ?

Mylan,

7 8550

What are the differences between GC and HPLC?

1 12131

Why do we need GC instead of HPLC? or Why do we need HPLC instead of GC?

4 9206




What is linearity in HPLC and how will you test?

1 16254

what is the difference between polarimeter lamp and ir lamp

2148

What is the difference of time between two consecutive injections in HPLC?

Nectar Lifesciences,

2 7960

what is difference between IR lamp and polarimeter lamp

Raks Pharma,

2 5880

Why dissolution test is not performed in all of the products

SDD, Biocon,

1268




why we need to do karl ficher fector ?

Reliance,

2 9102

Why we are use 0.005M Sulphuric acid, in control of absorbance performance test UV Spectrophotometer calibration

Reddy Labs, Cipla,

2 12059

How much sample concentration should i inject against diluted standard in related substances for drug product in hplc analysis

Apotex,

1 2167

how to prepare 25 ppm acetone. explian with formula

4 11743

why sucrose not used in polarimeter calibration?

Cipla,

2 7746

What is the diffeence between assay and uniformity of content

2 7069

why ur using toulene in hexane in u.v calibration?

Cipla, Biological.e.limited,

3 23734


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Un-Answered Questions { Analytical Chemistry }

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

448


Home heating oil or furnace oil what is made from? Can (base oil plus diesel/kerosen) = home heating oil?

950


2. Two grams of Benzoic acid are dissolved in 200 ml of water and extracted with 200 ml of diethyl ether. The distribution coefficient of benzoic acid is 100, and its dissociation constant is 6.5 10-5. Calculate the distribution ratio (D) of benzoic acid at pH 2, 5, and 6. 3. Calculate D at pH 2 to 10 (1 unit apart) in the above problem, and plot D versus pH.

967


For titration in anhydrous media with perchloric acide, if lack of titrator, Which indicator is been used for replacement. How calculate pH of test solution to choose suitable indicator?

974


1.What is the difference between method validation and method verification 2.Which guidelines proposed to method transfer

341






why we are using hexane in calibration of number of drop per mL

314


How much is the standard area for glc analysis

1027


How to calculation of residual solvent methanol (3000 ppm) standard solution, and how many quantity used of test sample

1297


how to select short coloum and long coloumn for new molecule

1114


what is impurity profile. how to interpret this impurity profile to a drug product or drug substance.

1214


function of detecter in hplc ,gc and spectroscopy? function of carrier gas in gc?

1286


what is procedure of actual procedure for registration of drug?

731


what is the procedure for cleaning of lenses of hatr accesory of ftir instrument?

1137


what is peak purity and its formula

316


How to check hplc detecter sensitivity?

338