Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

How can you prepare 0.1% Phosphate buffer solution?

6 8345

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

Police Constable,

1 1238

difference between quality and quantity

3 9258




why we get only one peak in assay by hplc but in rs by hplc get more peaks

MSN Pharma,

1 8884

In performance Check of GC Why Hexadecane Peak is Considered 

MSN Pharma, Asian Paints,

1819

Is it required to inject 6 injections for % RSD of a system suitability in lc or gc

Raks Pharma,

3 9237

Why do we use KCl ,K2Cr207,Toulene & Halonium oxide for the caliberation of UV

Apotex,

2 13074

what is rt and rrt? how we find rrt? relation between rt and rrt/

Cadila,

1 12265




why the ph scale range is 1 t0 14 and why not beyond 14 and not to below 1?

Orchid, Granules, Avra,

5 17257

What is method validation in quality control

Alchem,

2452

Why we use uracil and caffeine in hplc calibration

Alchem, Reddy Labs,

4 20346

If mass balance is not passing in forced degradation in method validation that method is suitable or not?

Dr Reddys, Reddy Labs, Aurobindo, Wockhardt,

1 6172

Why we compare unequal concentrated solutions in heavy metals test. For example comparing the test solution with 1 ppm lead standard and telling it's less than 20ppm?

Micro Labs, Mistair,

1 5934

What is the reason for negative peak in HPLC while using UV detector.

2 12549

What is the reason of RT change in new column v/s old column in HPLC

Apex,

3 14201


Post New Analytical Chemistry Questions






Un-Answered Questions { Analytical Chemistry }

some product having water content method with pyridine and ethylene glycol mixture instead of methanol? how they are selecting and methanol is not suitable solvent how ?

1202


Why potassium dichromate is used in calibration of uv?

373


In dissolution of tablets/capsules elaborate the Dissolution limit 20.0% to 60% Q in 30 minutes.

775


Why sometime potassium ortho phosphate mix with acetone use for sample preparation for hplc

309


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?

1338






Basic principle of ESI?

885


1.What is the difference between method validation and method verification 2.Which guidelines proposed to method transfer

305


Why sodium hydroxide used for maintain pH of phosphate buffer

997


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

1137


How we can determine water content in piperazine

936


How do we quantify crystaline and amarpous forms by using (NMR, XRD)spectroscopic techniques? Which any others instruments are useful for this quantification? explain

1204


why sre you used Potassium hydrogen phthalate in standarisation of 1N NaOH and 0.1 N Perchloric Acid?

6989


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

2253


What is control room temperature and which guide line says?

397


Tell me about analytical method validation in QC

2100