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 74105

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 41426

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

Neuland,

3003




What is the Column Endcaping in HPLC ?

Aptuit Laurus,

3 9862

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

Orchid,

2 7098

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

1 1703

difference between pH & pOH ?

4 16691

what r the reasons to get peak telling?

Cipla,

6 9875




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 9761

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 2439

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

3 11152

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 7081

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

Micro Labs,

5 15023

WHAT IS THE USAGE OF REFRACTIVE INDEX IN PHARME FIELD

3 6098

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

Cipla,

12 15995


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Un-Answered Questions { Analytical Chemistry }

What is the pilot-plant in pharma sector.

882


What is the purpose of octyl silane columns?

2423


In HPLC (Waters) software Empower1,2 &3 what is the updation for each version

1305


What is gelatinization?

306


pda detector mechanism?

929






please explian me about area normalisation method,diluted standard method,impurity vs impurity and which one has to be selected in method development

241


Qc interview questions

238


How to compare XRD graphs against standard and carry polymorpism study of API's by powder XRD method?

2485


give clarity of linearity and range in method validation

857


Can we interpret accuracy from linearity in method validation?

668


How can we calculate offset value pH measurment

119


what is the principle involved in turbidometry and nephelometry ?

2160


explain 5 components of gas chromatography ?

563


What is method validation in quality control

2297


how a particular wavelength can be different for a particular compund while analysing by uv and by HPLC.

1011