摘要
考察了自行组装的高效微量进样系统在 2 2 μL/ min低提升量下电感耦合等离子体质谱的基体效应 .质量数和电离电位不同的基体元素质量浓度为 2 g/ L时 ,低质量数分析元素受到一定的干扰 ,而对于高质量数分析元素 ,其信号几乎不受基体元素干扰 ,归一化信号值接近 1 .对于体积分数为 5 %的有机基体样品溶液 ,此微量高效雾化系统测得的归一化信号值多接近 0 .5 .实际样品中常见的基体元素 K,Na,Ca和 Mg质量浓度低于 5 0 0 mg/ L,以及乙醇和乙酸体积分数小于 1 %时 。
Matrix effects of inductively coupled plasma mass spectrometry(ICP-MS) with the self-installed micro-sampling system at 22 μL/min of solution uptake rate were studied. In the presence of 2 g/L matrix elements with different masses or ionization potentials, the signal intensity of analyzed elements was measured. For light analyzed elements, the interferences were observed; while for high mass analyte elements, the normalized intensity was close to 1. In the presence of 5% organic matrix, the normalized intensity was near to 0 5. When common elements such as K, Na, Ca, Mg at 500 mg/L or 1% organic solvents such as ethanol and acetic acid existed in the solution, the signals of analyzed elements were almost not affected. The results show that the micro-sampling system has a good capability of anti-interference to matrixes.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2004年第2期252-255,共4页
Chemical Journal of Chinese Universities
基金
国家自然科学基金 (批准号 :2 0 0 75 0 2 9)资助
