Gaëtan Richard

6 Questions 23 Answers 0 Followers

Questions related from Gaëtan Richard

In which sub-category of the intensity methods can be classified the perceived intensity method ?

In the introduction, the author gives the list of the different available GC-O methods, and especially the third group that corresponds to the intensity methods that can be divided in 3 sub...

08 August 2014 8,148 0 View

What is the usefulness of triethylamine for HPLC analysis of cations at pH 7?

I have to analyse by HPLC two molecules : gramine and hordenine which both present a tertiary amine. Their pKa is close to 10. I found a protocol which describes the separation of both molecules...

06 June 2014 5,325 3 View

How can I use the compatibility of PC and ABS with organic solvents?

I'm working with 2 polymers: PC (polycarbonate) and ABS (acrylonitrile-butadiene-styrene). I have to be able to distinguish these two polymers in a simple way. My first idea was to check their...

03 March 2014 5,293 2 View

Retention time of chlorophyll on RP (reverse phase)

I developed an HPLC method on a C8 column for the separation of the constituents of a green plant extract. During the purification of these extracts by preparative HPLC, I noticed that the...

04 April 2013 5,990 12 View

Does a column overload cause fronting or tailing?

In the case of injecting a very concentrated substrate in a HPLC system, will we observe tailing or fronting? I would say a fronting since the substrate that is not absorbed into the stationary...

03 March 2013 302 9 View

Is there any problem in analysing triglycerides by HPLC-ELSD?

I'm developing a HPLC method to analyse triglycerides with C8 to C18 length alkyl chains, and my question concerns the detection of these compounds. UV detection is impossible (especially for...

02 February 2013 4,825 15 View