双阳极电化学氢化物发生原子荧光光谱法测定砷  

Determination of Arsenic by Atomic Fluorescence Spectrometry with Bi-anode Electrochemical Hydride Generation

作　　者：申屠超[1] 侯逸众[2] 范云场[3] 朱岩柏[3] 侯逸众 

机构地区：[1]浙江树人大学生物与环境工程学院,杭州310015 [2]桂林工学院材料与化学工程系,桂林541004 [3]浙江大学西溪校区化学系,杭州310028

出　　处：《分析化学》2008年第11期1592-1596,共5页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金(Nos.20527005,20775070);浙江省分析测试科技计划项目(No.2008F70013);浙江省自然科学基金(Nos.Y4080064,Z404105)资助项目

摘　　要：用双阳极电化学氢化物发生原子荧光光谱法测定砷,减少了化学试剂使用给环境带来的污染。在相同条件下,双阳极电化学氢化物发生效率为化学法的99.0%-101.6%。对各种实验参数和干扰情况进行了详细研究。在选定的实验条件下,100μL进样量的As（Ⅲ）线性范围为0-120μg/L;检出限为0.64μg/L（信噪比S/N=3）;60μg/L的As（Ⅲ）标准溶液平行进样13次,荧光信号面积的相对标准偏差（RSD）为2.02%。用本法测得GBW07406号标准土壤样品中As含量为（205.2±1.4）μg/g与标准值（220±21）μg/g一致,仔猪饲料样品的加标回收率为97.0%-103.0%。本法灵敏度高、重现性好、结果准确。Determination of arsenic by atomic fluorescence spectrometric with bi-anode electrochemical hydride generation （BAECHG）was investigated. This novel method reduced the use of chemical reagents and thus reduced environmental pollution because no chemical hydride generation procedure was used. Under the same conditions, the hydride generation efficiency of BAECHG was 99.0% - 101.6% of that of chemical hydride generation method. Parameters and interference conditions were investigated. Under the selected conditions, the linear range was 0 - 120 μg/L for arsenic（As, injection volume： 100 μL）. The detection limit（signal to noise ratio of 3：1 ） was 0.64 μg/L. The relative standard deviation（RSD） obtained by using standard solution with 60 μg/L of As was 2.0% （ n = 13 ）. The proposed method was applied to analyze the reference soil sample （ GBW07406）, the result was consistent with the certified value. The spiked recoveries of piglet feed sample were 97.0% - 103.0%. High sensitivity and good repeatibility are the advantages of this method.

关 键 词：双阳极电化学氢化物发生 原子荧光光谱 砷 

分 类 号：O613.63[理学—无机化学]