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,


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


2 13074

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


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



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


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 ?


Why potassium dichromate is used in calibration of uv?


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


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


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?


Basic principle of ESI?


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


Why sodium hydroxide used for maintain pH of phosphate buffer


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


How we can determine water content in piperazine


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


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


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


What is control room temperature and which guide line says?


Tell me about analytical method validation in QC