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On-line size-exclusion chromatography/electrospray ionisation mass spectrometry of aquatic humic and fulvic acids

✍ Scribed by Linn Persson; Tomas Alsberg; Gyula Kiss; Göran Odham

Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
129 KB
Volume
14
Category
Article
ISSN
0951-4198

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✦ Synopsis

Isolated aquatic humic and fulvic acids were analysed with on-line size exclusion chromatography/electrospray ionisation mass spectrometry (SEC/ESI-MS). An eluent composition which enabled electrospray ionisation was identified. The SEC separation improved interpretability of mass spectra and may open up new possibilities for molecular weight determination of humic substances. A linear dose-response relationship over a factor of 20 was obtained and the limit of detection was 50ng/uL for humic and fulvic acids. Spectral changes due to different ionisation conditions (pH and cone voltage) were investigated. A natural water sample from a Swedish lake was analysed. Copyright 2000 John Wiley & Sons, Ltd.

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