Determination of Trace As and Se in Complex Matrix Sample by Inductively Coupled Plasma-Mass Spectrometry with O_2 Collision/Reaction Cell
- VernacularTitle:等离子体质谱-氧气碰撞池技术测定复杂基体样品中痕量砷和硒
- Author:
Bingyuan LU
;
Wenwei LU
;
Weilin ZHU
;
Yan LU
- Publication Type:Journal Article
- Keywords:
Inductively coupled plasma-mass spectrometry;
complex matrix;
arsenic;
selenium;
oxygen collision/reaction cell
- From:
Chinese Journal of Analytical Chemistry
2009;37(12):1781-1785
- CountryChina
- Language:Chinese
-
Abstract:
The O_2 collision cell technology was accepted to move the analyte to new oxide line position in stead of attenuating the double charge ions directly. A minus kinetic energy discrimination configuration was used to promote the oxide ions passing. An isobaric interference on new oxide line was corrected by a mathematic equation. It was found the enhancing effect of organic reagent benefit to As and Se oxide ion signal also. The 1% methanol sample solution was applied to improve the analyte sensitivity. The detection limits were 4.5 ng/L for As and 6.2 ng/L for Se. The background equivalent concentration was 0.022 μg/L for As and 0.025 μg/L for Se. The analysis errors enter into the allowed range of the standard material, which greatly improve the analytical accuracy of the actual sample.
