Premium
Measurement of sugars using the laser spray technique with a gold capillary
Author(s) -
Takamizawa Atsushi,
Maeda Hiroaki,
Kambara Shizuka,
Furuya Hiroko,
Hiraoka Kenzo
Publication year - 2008
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.3631
Subject(s) - capillary action , chemistry , laser , analytical chemistry (journal) , irradiation , aqueous solution , laser power scaling , chromatography , composite material , optics , materials science , physics , nuclear physics
A gold (Au) capillary has higher thermal conductivity than a stainless steel capillary and can withstand capillary over‐heating induced by high CO 2 laser irradiation (over 2.5 W) better than a stainless steel capillary. For this study, a laser spray using an Au capillary was applied for the detection of sugars. The signal of cationized compounds [M+Na] + can be detected with higher sensitivity than with conventional laser sprays using high laser power (over 2.7 W). Using 3.5 W of laser power, the signal intensity is 15 times higher than the maximum value with stainless steel (2.3 W) in a 10 −5 M maltose aqueous solution. It is considered that almost all the water molecules evaporate by laser irradiation, which is impossible to achieve using a stainless steel capillary. Copyright © 2008 John Wiley & Sons, Ltd.