Cristián Cerda-Barrera

6 Questions 11 Answers 0 Followers

Questions related from Cristián Cerda-Barrera

What is the best SPE material for PAH clean-up?

PAH are dissolved in mixture Diethyl ether/hexane. Samples coming from air monitoring in PUF or quartz filters (PM2,5).

09 September 2013 465 0 View

Is clean-up required for PAH samples if I use SIM mode in GC/MS?

Samples are collected from air sampling (high vol) from filters (quartz) and PUF, which are extracted by soxhlet in Hexane/Diethyl ether extractant solution. Moisture appears in samples like...

22 August 2013 325 1 View

How to remove background signals in mass spectra?

Signals attributable to contamination by column bleed (m / z 73, 207) appear in the mass spectra. These signals interfere with the mass spectra of the target analytes, making it difficult to...

31 May 2013 9,838 27 View

How to achieve good adhesion between metal or ceramic support and catalyst?

The idea is generate an high-temperature resistant catalyst.

02 April 2013 5,257 2 View

What is the best solvent to dilute FAME (fatty acid methyl ester) samples for GC/MS analysis?

FAME will be obtained from vegetable oil and MeONa reaction.

08 October 2012 3,841 40 View

How can I determine the solvent delay of extracts obtained from biomass pyrolysis?

I have a problem with some samples injected in GC/MS. The volatile components coming from the reactor are condensed in acetone. The extracts are diluted and injected in GC/MS but sometimes they...

19 July 2012 4,140 2 View