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, Reddy Labs, Malladi Drugs and Pharmaceuticals,

6 6460

What is column in chromatography?

Chembond Chemicals,

881

Which Pharmacopiea follow calibration of HPLC,GC

Reddy Labs, Bayer,

3 6263




Why Holium cholorate used in UV Spectro photometer?

Reddy Labs,

7 6113

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

Nirma,

1 3330

Why water not directed by FID detector 

Amoli Organics, Lupin,

2 3786

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

974

how the compound separate in coulunm,explain

Wockhardt,

1112




What is the principle of HPLC?

Cipla, Lupin,

3 6415

Why methanol & acetonitrile is mostly used for hplc analysis?

DRL,

2 10125

Explain about empower software of analysing?

DRL,

1 3605

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

Raks Pharma,

1012

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

Student,

1 2442

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

Beni Suef University, Sri Krishna Pharmaceuticals, Graviti Pharmaceuticals,

785

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 6817


Post New Analytical Chemistry Questions






Un-Answered Questions { Analytical Chemistry }

Colorimtry

293


How we performed the force degradation for drug substance, is any specific guideline is available for each parameter(Acidic, basic, oxidation,heat)? what conditions you mentained for above parameters.

1095


how you determine moist.of NaOH sol or NaOH flacks

1111


we are performed SOR for a particular product the limit is -6 to -10.We face particular bathes it is not meeting the specification.we performed diffrent instrument diffrent analyst we are getting diffrent diffrent results.solvent is dimethyl sulfoxide what could be the reasion

542


Please tell me about the pH of Polycaboxylic ether is it in the 5-6 range ever or more than 6

1395






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

2145


A ha tc is actual defination of retention time?

302


What is the diference between residual solvents and organic volatile matter

762


What is viod volume and peak purity in HPLC?

1473


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

809


calibrtion procedue of LC-MS

1335


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

887


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

1736


how will you do the prep for unstable componds?

726


We use Potassium Dichromate solution for the calibration of UV-Visible Spectrophotometer in UV region. My question is to calibrate visible region which solution could be used in photometric accuracy

299