摘要
基于存在活化剂ａ，ａ′－联吡啶和增敏剂ＴｒｉｔｏｎＸ－１００，Ａｇ（Ⅰ）催化过硫酸钾氧化曙红的反应，拟定了测定痕量Ａｇ的新催化荧光速率法。由于添加了ＴｒｉｔｏｎＸ－１００，灵敏度提高９倍。测定银含量线性范围为４～１２ｎｇ／ｍｌ，相对标准偏差为２．６％（ｎ＝９），检出限为５×１０－４μｇ／ｍｌ。可用于测定Ｐｂ和光谱感光板中的Ａｇ。
A new catalytic fluorescence rate method for the determination of trace amount of Ag(Ⅰ) had been developed. The method was based on the oxidation of eosin by potassium periodate in the presence of a a′ -bipyridyl as an activator and TritonX-100 as a sensitizer. Because of the addition of TritonX-100, the sensitivity rised 9 times. The linear range of determinating Ag(Ⅰ)was 4～12 ng/ml. The detection limit was 5×10^-4μg/ml, the relative standard deviation was 2.6%(n=9). The method can be used for the determination of silver in lead and spectral photographic plate.
出处
《贵金属》
CAS
CSCD
北大核心
1998年第1期29-32,共4页
Precious Metals
