摘要
本文研究了锌对塞曼效应石墨炉原子吸收法测定硒的基体改进作用，用２００ｍｇ／Ｌ的锌加入硒试液后，使灰化温度达到１０００℃，灵敏度提高４．５倍。在最佳条件下，特征质量为２９．９ｐｇ／０．００４４Ａ，检测限为５．３μｇ／Ｌ。校正曲线线性范围为０～６００μｇ／Ｌ，５０μｇ／Ｌ硒标准溶液９次测定的ＲＳＤ为５．４％。含有２００ｍｇ／Ｌ锌试液中，１０ｍｇ／Ｌ的Ａｇ、Ｃａ、Ｃｄ、Ｃｒ、Ｃｕ、Ｆｅ、Ｋ、Ｎｉ、Ｍｇ、Ｍｎ和Ｓｎ不干扰２００μｇ／Ｌ硒的测定，所建立的方法应用于废水中硒的测定，回收率令人满意。
The matrix modification effect of zinc for Zeeman effect graphite furnace atomic absorption spectrotnetric determination of selenium has been studied. The addition of 200mg/L Zn to selenium solution allows a maximum charring temperature of 1000℃ and results in 4.5--fold increase in sensitivity.Under optimum conditions , a characteristic mass of 29. 9pg/0. 0044A and a detection limit of 5.3μg/L are obtained. Linearity of the calibration curve is abserved in the range of 0--600μg/L Se. Nine determinations of a 50μg/L Se standard solunon gives a RSD of 5.4%.For a 200μg/L Se solution containing 200mg/L Zn, 10mg/L of K,Ag,Ca,Cd,Cu,Mg,Mn,Ni,Sn,Fe and Cr causes no significant interference,respectively.The developed method has been applied to the determination of selenium in waste water with satisfactory recoveries being obtained.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
1996年第3期111-115,共5页
Spectroscopy and Spectral Analysis
