磷酸氢铈纳米吸附剂预富集-火焰原子吸收法测定水中痕量铅  

Flame atomic absorption spectrometric determination of trace lead in water after preconcentration with nano cerium hydrogen phosphate

作　　者：刘正丹[1] 徐云斌[1] 曹美龄[1] 徐立[1] 孙芳[1] 胡迅[1] 

机构地区：[1]武汉市疾病预防控制中心环境健康与食品安全所,湖北武汉430015

出　　处：《现代预防医学》2016年第3期530-533,541,共5页Modern Preventive Medicine

摘　　要：目的建立磷酸氢铈（CeP）一维纳米吸附剂预富集-火焰原子吸收法测定水体中痕量铅的新方法。方法用10 mg CeP对pH为2-9的200 ml水样中的Pb^2＋吸附富集30 min,抽滤后再用4.00 ml 2mol/L的硝酸溶液解吸60 min,用火焰原子吸收法测定解吸液中的Pb^2＋。结果该方法测定Pb^2＋的线性范围为10-400μg/L,回归方程为y=0.0011x＋0.0043,线性相关系数r〉0.999,检出限为1.14μg/L,相对标准偏差为1.12%（n=9,80μg/L）,加标回收率为99.8%-107.5%。结论本方法线性范围宽,灵敏度高,准确度和精密度良好,操作条件简单,测定成本低,可应用于环境水样中痕量铅的测定。Objective To establish a method for the determination of trace lead in environmental water by CeP preconcentration combined with flame atomic absorption spectrometry. Methods 10 mg CeP was used to adsorb Pb2＋for 30 min in 200 mL water sample, with the pH range of 2 to 9. Then Pb2＋adsorbed on CeP was desorbed by 2 mol/L nitric acid for 60 min and detected by FAAS. Results The limit of detection for Pb2＋was 1.14 μg/L. The linear range of the determination was 10 - 400 μg/L with a correlation coefficient greater than 0.999. The precision was 1.12%（n = 9, 80 μg/L）, and the recovery rates were 99.8% - 107.5%.Conclusion The method is selective, sensitive, accurate, reliable and feasible for the determination of trace lead in environmental water samples.

关 键 词：吸附剂 磷酸氢铈 火焰原子吸收法 水 铅 

分 类 号：R115[医药卫生—公共卫生与预防医学]