UNSPECIFIED (1998) Comment: Reproducibility of spectra and threshold fluence in matrix-assisted laser desorption/ionisation (MALDI) of polymers. EUROPEAN MASS SPECTROMETRY, 4 (2). pp. 127-131. ISSN 1356-1049

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Abstract

We represent that roughing of the stainless steel substratum by sandblasting (SB) and "fast evaporation" deposition of 2,5-dihydroxybenzoic acid (2,5-DHB) leads to more consistent and repeatable results. It was shown that sandblasting (SB) gave representative results, which had higher precision than the non-sandblasted (NSB) substrate on the stainless steel slide. The SE samples were more reproducible, as seen by the (i) over bar/a(higher value) as compared to the NSB (lower (i) over bar/sigma vales). The values range from 13.46 (SE) to 1.34 (NSB). It was also shown, that the SE samples were more reproducible shot per shot. This was due to the sandblasted roughing of the slide, which gave more surface area over which the matrix could distributes itself more evenly. This treatment also gave lower thresholds. The threshold of the PEG was lower on the SE region (P 100) compared to that of the NSB region (P 120) for the 2,5-DHB-PEG-NaCl system.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Journal or Publication Title:	EUROPEAN MASS SPECTROMETRY
Publisher:	IM PUBLICATIONS
ISSN:	1356-1049
Date:	1998
Volume:	4
Number:	2
Number of Pages:	5
Page Range:	pp. 127-131
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/15266

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