Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

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

315

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

233

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?

211




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

260

in sampling of raw material which side is pasted sampled labels

254

why holium oxide prepared in 10% HCLO4 SOLUTION

100

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

53

What is the importance of rrf in rs by HPLC?

48





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Un-Answered Questions { Analytical Chemistry }

Why we used in n-butyl acetate water content terminology while in ethyl acetate we used moisture content terminology?

638


What is the calibration of uv process and preparation

793


In Karl Fischer titration,What is the situation if the material tested is only soluble in water,and not soluble in the common solvents used such as methanol ?? [e.g. Iron III Hydroxide polymaltose]

1604


HI,I CLEARED BOB CLERK EXAM. MY INTERVIEW WILL BE ON 9TH OCTOBER,2010.PLEASE SEND ME INTERVIEW QUESTIONS AND ANSWERS. THANK YOU.

1093


explain 5 components of gas chromatography ?

752






How will u perform degradation study in detectors other thann PDA in HPLC Methodology

1323


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

2196


could negative ions be produced by bombardment process in mass spectrometry?

287


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

1026


What is column in chromatography?

898


Difference between hlaf and rlaf

794


Which is the highly polar and highly non polar column in HPLC?

904


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

315


why does used dry caffien in HPLC calibration?

683


What is the diference between residual solvents and organic volatile matter

779