Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

why we use x terra columns at higher ph ?

Hetero,

2 7688

what is dead time in hplc?

Orchid,

3 14041

what is the difference between melting range & melting point? Which is more significant?

5 21900




what is the significant of pH in HPlc?

Orchid,

5 10048

what is weight veriation in pharma industry ? plz explain me

959

How to now that my acid is contact with base or base is contact with acid in drugs, is there any techniq to identify the formation of salt(drug)

Reddy Labs,

2 4317

what is least count of a balance? How we find out this? Any formula for least count of Analytical balance?

Dr Reddys, Reddy Labs, Analytical Solutions,

11 63132

Explain about Low pressure gradient and High Pressure gradient systems in HPLC?

Mylan, Orchid, Roshanico,

4 19084




what is protocol ? plz Explain me

5 7889

How can we confirm the HPLC column is end-capped or not? Is it possible to identify by physical appearance?

JBCPL,

1732

HPLC Calibration was done in Reverse Phase, but not in normal phase why explain?

Cipla, Orchid,

11 22341

what are the standard methods for HPLC?

Orchid,

1407

What is the procedure for investigation of an OOS (Out of specification) results?

Reddy Labs, Dr Reddys, Biocon,

4 14789

How do you give training to a new chemist

Reddy Labs,

3 7311

what is the Bracketing & Matrixing.

Ranbaxy, Dr Reddys,

8 33885


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Un-Answered Questions { Analytical Chemistry }

For limit test of heavy metals in BP, Method C require that the substance is ignited at a temperature not exceeding 800 °C. Why confines such the temperature?

2219


A ha tc is actual defination of retention time?

144


How can the GC or HPLC method is selected to determine the impurity profile in drug product?

5246


what is difference between zero air gas and o2 gas

5454


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

1793






WHY given much noise PDA dector then VWD Dector

586


why glutent are detected in the rice cereal baby food product even manufacturer claimed that they are using rice and milk only?we have using ELISA to do the test,and rice supposed not containing any glutent,rite?We already repeat the test so many times and it still detected.just wondering where the glutent came from?

1169


what type of questions asked on analytical balance and also give answers................all pharma companies?

5516


Ratio of Water and Acetonitrile(diluent) is not recommended to use in cleaning method validation,why?

1584


wat is the role of michelson interferometer in FTIR and He-Ne lase.detailed answer required in simple language

990


What is the purpose of octyl silane columns?

2425


What is the main difference between ODS1 and ODS2 Hplc column.

1491


how can I make the copper get white bye any salt or acit?

915


what is the identification test of volatile substance? what is volatile compound?

895


In the isomers,enantiomers give the only physical properties present such that no chemical properties present.

880