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.
出处
《华中师范大学学报（自然科学版）》
CAS
CSCD
北大核心
1997年第4期450-453,共4页
Journal of Central China Normal University：Natural Sciences
关键词
火焰原子吸收
富集
银
铂电极
NAFION修饰电极
flame atomic absorption spectrometry
Nafion modified platinum wire
preconcentration
