键合硅胶固相萃取重金属离子

Solid Phase Extraction of Heavy Metal Ions by Bonding Silica Gel

利用单因素试验对SiO_2-NH_2吸附溶液中铅、砷的条件进行了测定。结果显示:加入0.025g SiO_2-NH_2对铅、砷的吸附效果最佳;吸附的铅、砷用10.0m L 0.05mol/L的HCl洗脱,洗脱效果最佳。方法的RSD为2.54%~3.54%(n=6),该方法简单、灵敏、准确、可靠。

In this paper, the conditions of lead and arsenic in SiO2-Nn2 adsorbed solution were determined by single factor test.The results showed that the adsorption of lead and arsenic was the best by adding 0.025g SiO2-NH2, and the adsorption of lead and arsenic was eluted with 10.0mL 0.05mol/L HC1, and the elution effect was the best.The RSD method was 2.54%-3.54% （n=6） .The method was simple, sensitive, accurate andreliable.