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Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

Why potassium hydrogen pthalate is used for perchloric acid And naoh. Why it is used for both acid and base

Vijayasri Chemicals,

6 24467

what are the normalisation, internal standard and external standerd methods in HPLC.

GVK,

2 12331

is ther any guidline is available for limt of peak fronting.and what is the limt of peak fronting.

2 9746

how would you determine the acceptance criteria for cleaning validationof product A for product B?

Cipla, Cypher Solutions, Torrent Power,

1 5922

How can we konw that the HPLC column is endcapped? Is it possible to identify visually without COA?

JBCPL,

2 8249

Why KBr pellet is used in IR?

Glochem,

11 21400

IN DISSOLUTION S1 STAGE 1 BOWL GOT 52%(Q POINT IS 80%)WHAT WE HAVE DO

9 11504

what is the meaning of PURITY AND POTENCY .what is the difference between PURITY and POTENCY

Orchid,

5 23411

Why Peak Purity is not determined in GC analysis?

GSFC, GVK,

1 4846

Why sodium lamp is used in polarimeter?

Aurobindo, Micro Labs, Mylan,

1 12571

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

Bank of Baroda,

1329

What is the difference between Primay and Secondry Standard ?

College School Exams Tests, Neuland,

6 47816

priciple of gc & hplc? (properly describe)

Cadila, Cipla, Reddy Labs,

2 13012

why we have to store the pH electrode in 4.01 buffer ?

Aurobindo, BioMax, BioSynth, Cipla, Indoco Remedies, SGS,

1 5791

give tha clarity about peak purity concept

Aurobindo, Reliance Life Sciences,

3 8889


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Un-Answered Questions { Analytical Chemistry }

What is column in chromatography?

1191


some product having water content method with pyridine and ethylene glycol mixture instead of methanol? how they are selecting and methanol is not suitable solvent how ?

1536


why holium oxide prepared in 10% HCLO4 SOLUTION

507


How we choose the mobile phase for method development.?

202


In rs method development when we are going area normalization method to dilute standard method?

278






Explain what is a base line?

227


what parameters we will consider while developing a HPLC method and how we confirm our HPLC method is valid?

2568


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

155


how to calculate corelation coefficient in G.C Calibration? what is the calculation part?

1357


Why only Copper standard is used to calibrate Atomic Absorption spectrophotometer?

1602


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?

1284


Why six unit used for precision?

237


How to choose the which salt is suitable for mobilephase

2115


Why dissolution test is not performed in all of the products

1584


How you develop a method in HPLC?

1648