期刊
ANALYTICA CHIMICA ACTA
卷 555, 期 2, 页码 263-268出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2005.09.021
关键词
single particle analysis; inductively coupled plasma-mass spectrometry; ICP-MS; gold colloid; colloid size
Analysis in a single particle mode of gold colloids in water has been performed by inductively coupled plasma-mass spectrometry (ICP-MS). The signal induced by the flash of ions due to the ionization of a colloid in the plasma torch can be measured for the ions (197)An(+) by the mass spectrometer without interferences. The intensity of the MS signal is recorded in time scan. The recorded peak distributions were analysed as a function of the colloid size for five monodisperse colloids (80-250 nm). This study describes the experimental conditions to analyse gold colloids in a single particle mode. The size detection limit is around 25 nm corresponding to 0.15 fg colloids and one particle per ml may be detected during a 1 min time scan within standard procedure. (c) 2005 Elsevier B.V. All rights reserved.
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