Manda Rossouw

4 Questions 21 Answers 0 Followers

Questions related from Manda Rossouw

What fullscan ability can one expect from a LC triple-quadrupole instrument?

I am doing research on phenolic compounds in alcoholic beverages. Could someone working with compounds like caffeic acid, epicatechin, catechin, chlorogenic acid, rutin, quercetin, procyanidins,...

19 August 2015 7,034 4 View

Has anyone seen LC-MS contamination of mass 117, 212 and 233 in ESI negative and 156 in ESI positive?

I’ve taken a look at common contamination/clustering ions information. Unfortunately I’m not seeing the main contaminant ions amongst them. The main negative ions are at 233 and 117 m/z in an...

05 February 2015 2,958 14 View

Can anyone recommend literature on UPLC-DAD-triple quadrupole fullscan sensitivity?

Dear fellow researchers, I would like to see phenols such as catechin, epicatechin, quercetin, rutin, ferulic acid, caffeic acid and p-coumaric acid at low microgram per litre quantities in...

21 May 2014 6,970 4 View

What is the best way to dissolve xylan in a watery medium without breaking up the xylan structure?

Some alkali would help, but I suspect I would get a large amount of breakdown in the xylan structure if I increase the alkali concentration too high. I would like to dissolve it to at least a 10%...

12 June 2013 6,592 22 View