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 7802

What are the differences between GC and HPLC?

1 10733

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

4 8529




What is linearity in HPLC and how will you test?

1 14824

what is the difference between polarimeter lamp and ir lamp

1949

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

Nectar Lifesciences,

2 7378

what is difference between IR lamp and polarimeter lamp

Raks Pharma,

1 5230

Why dissolution test is not performed in all of the products

SDD, Biocon,

1099




why we need to do karl ficher fector ?

Reliance,

2 8517

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

Reddy Labs, Cipla,

2 11040

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

Apotex,

1 1749

how to prepare 25 ppm acetone. explian with formula

4 10388

why sucrose not used in polarimeter calibration?

Cipla,

2 7193

What is the diffeence between assay and uniformity of content

2 6447

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

Cipla, Biological.e.limited,

3 21015


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Un-Answered Questions { Analytical Chemistry }

Why sodium hydroxide used for maintain pH of phosphate buffer

822


HI,I CLEARED BOB CLERK EXAM. MY INTERVIEW WILL BE ON 9TH OCTOBER,2010.PLEASE SEND ME INTERVIEW QUESTIONS AND ANSWERS. THANK YOU.

895


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

1286


what is the difference between potentiometric titration and karl fischer titration?

865


what is difference between zero air gas and o2 gas

5450






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

157


How can the GC or HPLC method is selected to determine the impurity profile in drug product?

5245


if you have given a blank water how you analyse by general analytical techniques?

626


How we can determine water content in piperazine

810


In HPLC Calibration, On which basis RSD Limit of noise test is fixed (NMT 33.0 % )

1890


What is gelatinization?

306


what is the purge flow & how to calculate

1096


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.

796


What is the purpose of octyl silane columns?

2423


How would you decide dissolution medium for NCE compound of class I drug

630