Nafion修饰铂丝富集——火焰原子吸收法测定银  

NAFION MODIFIED PLATINUM WIRE PRECONCENTRATION——Flame Atomic Absorption Spectroscopic Determination of Trace Silver

作　　者：姚磊明[1,2] 万家亮[1,2] 陆光汉 

机构地区：[1]湖北教育学院化学系 [2]华中师范大学化学系

出　　处：《华中师范大学学报（自然科学版）》1997年第4期450-453,共4页Journal of Central China Normal University：Natural Sciences

摘　　要：利用Ｎａｆｉｏｎ修饰铂丝基体富集——火焰原子吸收法测定痕量银．在０．５～３０ｎｇ／ｍＬ范围内，银的浓度与吸光值呈线性关系，该方法已用于黄铁矿中痕量银的测定，方法的相对标准偏差为３．７％，其灵敏度比常规火焰原子吸收高２５０倍．This work utilizes preconcentration of Ag + on a chemically modified Nafion platinum wire prior to their determination by flame atomic absorption spectrometry(FAAS). The absorbance is linearly relative to the concentration of Ag + in the range of 0.5～30 ng/mL,and the relative standard derivation of this method is 3.7%. The method has high sensitivity and has been applied to the determination of trace Ag + in pyrite with satisfactory results.

关 键 词：火焰原子吸收 富集 银 铂电极 NAFION修饰电极 

分 类 号：O657.31[理学—分析化学] O614.122[理学—化学]