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Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

What is the principle of GC/HPLC ?

BioCan, Biocon, Megafine Pharma,

4 52761

Why pH Range has been fixed as 0 to 14 ?

Akums, Cipla, Matrix, SUN,

1 5357

How you develop a method in HPLC?

CU, Perrigo, Wockhardt,

1610

why using buffers in hplc inteed of water

5 9953

How long we can use hygroscopic reference standard in terms of water absorb.I mean in line with respective monograph's specification or more than that?

1 1680

Why we use methy Ethyl Propylparabine For HPLC Calibration

1 3893

What is use of LOD and LOQ in validtion and give range and in calculation why we use 3.3* LOD here why we use 3.3

Dr Reddys, IPCA, Reddy Labs,

2 3960

In specificity what parametrs are consider why that parametrs

2 4506

ash or residue in that what will be there.

3 3824

How can we determine Moisture content of HI?

Cipla, Reddy Labs,

1 1756

What is difference between oos

Gennex,

7 23235

what is the differance between Analytical and semi micro balance?

2 10929

In the method validation proceedure,lod & loq calculation we use the formulae for LOD=3.3*SD/slope and for LOQ=10*SD/slope,why we use 3.3 & 10 in the formulae?

1 9167

In HPLC Chromatographic separation Resolution equation is Rs = 1.18 (tR2 –tR1)/wh1+Wh2, Where, tR2 and tR1 is run time of eluent ratios of the distances from the point of application to the centers of the spots and the distance travelled by the solvent front from the point of application (retardation factor), and Wh1and Wh2 , is peak width of at half height. What is 1.18 ?

1 4530

what is mean by theoritical plates(not formula) ?

Micro Labs,

4 11381


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Un-Answered Questions { Analytical Chemistry }

What are the primary considerations in extractables and Leachables ?

1314


How to fix the sample conc. in Related substances test by HPLC?

113


What is rs test why we are performing rs test?

254


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

998


why does used dry caffien in HPLC calibration?

1018






What is delay volume?

191


what is the principle involved in turbidometry and nephelometry ?

3054


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

1293


can we use the same detector in HPLC as well GC and what could be the differences we can find in the final chromato graph in any aspects?

1258


Basic principle of ESI?

1160


How do we get end points and how many end points are possible for citric acid and di-acid not theorotically answer should be given practically.

1495


mode of absorption in alimentary canal?

1459


What is the purpose of octyl silane columns?

3209


pharma industries oriented

1175


Tell me something about Vitamin A test method by HPLC

1683