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Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

WHY pKa value is more important than pH value of the mobile phase in HPLC?

1768

Many times I don't got a caffeine peak in calibration of hplc using guard column ❓

1819

For standardization of volumetric solutions, acceptance limit for concentration is considered as 10% of nominal concentration and %RSD as NMT 0.2% (for appropriate no. of replicates). But , if %RSD has not met, what should be further action?

1907

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

2171

in sampling of raw material which side is pasted sampled labels

1838

why holium oxide prepared in 10% HCLO4 SOLUTION

1462

Why 162 mg NaOH used for 1N volumetric solution in 150 ml water then 54.5 ml diluted with 1000 ml

1918

What is the importance of rrf in rs by HPLC?

1 3224

Why use only methanol,used determinationof moisture content not use other solvents

1405

please explain about aluminium hydroxide assay

1132

How to know the estimated LOQ concentration in ppm

1213

What is the difference between c8 and c18 hplc column?

1 2144

Why karl fisher factor is 5 ?

1 2157

Loss of linearity in tkn analysis, possible reasons?

1317

In rs method development when we are going area normalization method to dilute standard method?

1521


Post New Analytical Chemistry Questions

Un-Answered Questions { Analytical Chemistry }

What is diffrence between extractable volume and deliverable volume? Answer pls

4573


As per ICH related substances stability trend limit from initial to shelf life

3253


what is mean by extactable and leachable study?

1172


why digestion require in icpms?

770


process of Diclofenac sodium,IP.

2211


how we can identify the impurity is coming below loq at transfering site?

872


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

2184


how require to interprit the method precision data of hptlc?

821


In IR spectra, generally a molecule vibrates without apply emr or ir light?

1979


USP methodology, EP methodology, IP methodology, among three if possible to use one methodology for qualify working standard to use USP, EP, IP ? Please explain...

2015


what is the disso medium for tropsiun chloride

2260


in which situation require to change rs specification?

749


what are the standard methods for HPLC?

2786


Why irmoisture balance is used for corrugated box moisture testing

2404


what is the procedure for cleaning of lenses of hatr accesory of ftir instrument?

2293