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Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

Can you please give a suitable definition and an example for understanding the words purity and potency.

Cipla, Malladi Drugs and Pharmaceuticals, Reddy Labs,

6 7519

What is column in chromatography?

Chembond Chemicals,

1186

Which Pharmacopiea follow calibration of HPLC,GC

Bayer, Reddy Labs,

3 7296

Why Holium cholorate used in UV Spectro photometer?

Reddy Labs,

7 7251

why we get negative values in uv when i placed sample which has some concetration but not in standard

Nirma,

1 3847

Why water not directed by FID detector 

Amoli Organics, Lupin,

2 4447

what is definition of validation? which components are followed give detail?

1278

how the compound separate in coulunm,explain

Wockhardt,

1423

What is the principle of HPLC?

Cipla, Lupin,

3 7421

Why methanol & acetonitrile is mostly used for hplc analysis?

DRL,

2 12057

Explain about empower software of analysing?

DRL,

1 4223

why we use Dichlorobenzene.nitrobezine.t-butyldi sulhate.for calibration of gc Head space

Raks Pharma,

1300

Why use the Omeprazole as a reference standard to estimate the assay of esomeprazole by HPLC method

Student,

1 2982

are there in uv lamb that is chractrestic for wavelenghth 205 nm ?????

Beni Suef University, Graviti Pharmaceuticals, Sri Krishna Pharmaceuticals,

1045

In UV calibration we use Holmium perchlorate solution made in 1.4M perchloric acid The question is that 1.4 M perchloric acid we make is it in water or glacial acetic acid?

4 8941


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Un-Answered Questions { Analytical Chemistry }

Home heating oil or furnace oil what is made from? Can (base oil plus diesel/kerosen) = home heating oil?

1290


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

3202


sop of a uv visible spectrophotometer double beam elico model

4651


If we do accuracy at same concentration at which linearity planned,what is the need to do linearity separately?

1304


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

8690






How would you decide dissolution medium for NCE compound of class I drug

1125


Why acetonitrile and water are used as extraction solvent when analysis melamine? I thought they are miscible and won't be able to separate...

675


What is the limit for single maximum impurity limit as per USP??

208


what type of question will ask in the interview of lab chemist.

2462


How to start the dissolution development for unknown tab?

688


Tell me something about Vitamin A test method by HPLC

1723


In Assy by potentio metry titration method how select MET U ,DET U, SET U,

605


How to establish relative response factor for hplc. Why it is required?

197


why does used dry caffien in HPLC calibration?

1063


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

2513