【摘要】 建立了碳 18键合硅胶柱 流动注射 电感耦合等离子体质谱 (C18 FI ICP/MS)联用系统。对螯合反应的pH ,碳 18柱的尺寸和填充松紧度 ,洗脱液中甲醇含量及洗脱液流速等进行了优化选择。联用系统已成功地应用于实际样品的在线富集分离分析。对Cd、Pb、Co、Ni和Zn 5种元素的检测限 (3σ)分别为 0 .0 3、0 .0 9、0 .1、0 .1、0 .3μg/L ,6次测定海水的RSD分别为 6 .8%、3 .4%、1.3 %、2 .6 %、0 .5 % ,标准加入方法的回收率分别为 91.3%、95 .1%、10 0 .4%、10 0 .3 %、95 .2 %。更多还原

【Abstract】 An online enrichment-separation system of C 18 and inductively coupled plasma-mass spectrometry (ICP/MS) with flow injection (C18-FI-ICP/MS) was established for the determination of trace heavy metals in seawater. The optimized experimental parameters including pH,C 18 column,concentration of methol in elute and the velocity of elute were investigated. This system was applied to the online preconcentration , separation and determination of trace heave metals in seawater samples successfully. The detection limit (3σ) for Cd, Pb, Co, Ni and Zn was 0 03, 0.09, 0.1, 0.1, 0.3 μg/L respectively. The RSD of Cd, Pb, Co, Ni, and Zn for six measurements of seawater was 6.8%,3.4%,1.3%,2.6%,0.5%,respectively. The accuracy was verified with spiked recovery test. The recovery for five elements was 91.3%,95.1%,100.4%,100.3%,95.2%, respectively.更多还原