Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

what is the purpose of Buffer in any titration?Ex:In determination of hardness of water we use ammonia ammoniachloride buffer in titration with EDTA.Why?

Amity, Sr Comunications, Prakriti,

13 74866

why KF factor is between 4.5 to 7.5 mg/ml ? why ? why sometime pyridine is used in analysis like in raw material solvent like acetone etc?

GVK, Sohan Healthcare, Aurobindo,

10 42332

what is the importance of peak purity in HPLC and how we can calculate through manul(not software)?

Neuland,

3036




What is the Column Endcaping in HPLC ?

Aptuit Laurus,

3 10029

When performing Moisture content how to you say only Methanol react with water not product Explain?

Orchid,

2 7219

give me method of calculating co relation of coefficient for HPLC,SOR & ANY OTHER

1 1774

difference between pH & pOH ?

4 16939

what r the reasons to get peak telling?

Cipla,

6 10074




How we develop a method by HPLC for unknown compound,if we got three peaks with same response then how we can find out which one is our desired compound's peak without taking help of LC MS.

Apotex, Kemwell,

4 9908

In case of dissolution test, if there is variation within 6 individual units however the batch is complying as per S1 criteria, is it necessary to do investigation for the same? What should be the criteria for such variation?

1 2527

What is the difference between bulk property detectors and Solute property detectors vivimed labs limited

3 11385

IF THE COMPOUND PKA IS 5.3 WHY WE ARE ADJUSTING PH+/-2 OF THE COMPOUNDS PKA. WHAT IS THE CONDITION

Dr Reddys, Reddy Labs,

2 7156

What are the limits for uniformity dosage content for tablets and capsules

Micro Labs,

5 15211

WHAT IS THE USAGE OF REFRACTIVE INDEX IN PHARME FIELD

3 6220

IN DISSOLUTION TEST S1AND S2 AND S3 CONDITIONS ALL ARE FAILED THEN WHAT IS THE DESSICION U CAN TAKE

Cipla,

12 16316


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Un-Answered Questions { Analytical Chemistry }

why sre you used Potassium hydrogen phthalate in standarisation of 1N NaOH and 0.1 N Perchloric Acid?

6655


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

928


What is Band broading effect explain

499


WHICH STANDARD WE USE IN SILICA ANALYSIS IN SILICA-GEL METHOD FOR SOLID SAMPLE

809


WHAT IS THE PURPOSE WE USE HCL, CHOPPER, BURNER, MONOCHROMATOR in AAS? PLEASE EXPLAIN BRIEFLY

996






how to select short coloum and long coloumn for new molecule

952


How to define samples weight in moisture content

81


A ha tc is actual defination of retention time?

177


how will you do the prep for unstable componds?

619


why does used dry caffien in HPLC calibration?

528


why we are using benzene, anyline in acetic anhdride assay titration method?

772


Why only hydroxy naphthol blue indicator is used for standardisation of 0.05M EDTA solution instead of solochrome Black T or Euriochrome Black T indicator which is used for all sample analysis with 0.05M EDTA solution?

932


What are usp limits for theoritical plats,resoution,tailing factor,peak to valley ratio

239


What is FFA, PV, and PAV value in oil.

500


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

635