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 76660

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 43473

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

Neuland,

3090




What is the Column Endcaping in HPLC ?

Aptuit Laurus,

3 10300

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

Orchid,

2 7364

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

1 1899

difference between pH & pOH ?

4 17269

what r the reasons to get peak telling?

Cipla,

6 10376




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 10161

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 2662

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

3 11707

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 7310

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

Micro Labs,

5 15575

WHAT IS THE USAGE OF REFRACTIVE INDEX IN PHARME FIELD

3 6369

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

Cipla,

12 16799


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Un-Answered Questions { Analytical Chemistry }

How to determine water content of bis tetrazole amine mono ammonium salt

1936


Describe your field experience sample type collected,sample techniques,field measurements taken and equipment used?

1463


what is partion and column chromatography

1034


how can give the expiry period and restadardisation of volumetric solution

1295


How to choose concentration of LOQ solutions for RS analysis? Example.

769






how the compound separate in coulunm,explain

1024


How to do regeneration of Metacarb Pb plus column?

1261


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

2194


How can we calculate offset value pH measurment

204


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

1465


What is the exact reason to use THF and IPA in buffers of Reverse phase HPLC as a solvent?

2491


1)What's the meaning of Absorption,give a example. 2)What's the meaning of Adsorption,give a example. 2)what is the difference between Absorption and Adsorption.

1144


What is intact assay method development.....?

1119


Why sodium hydroxide used for maintain pH of phosphate buffer

929


what is the principle of UV Vis spectroscopy, AAS, ICP OES,ICPAES, ICP-MS and FTIR

6057