摘要
AFS-9700双道原子荧光光度计测定环境水样中的锡，选择最佳的仪器条件：负高压300v，原子化器高度8mm，灯电流80mA，载气流量400ml／min，屏蔽气流量900ml／min。在最佳酸碱比例一体积分数为4．％的硝酸介质与20g／L硼氢化钾中，锡荧光强度与其质量浓度在1．00～10．0ug／L成线性关系，方法检出限为0．010ug／L，加标回收率为94．40／0-105％，RSD（n=7）〈2.3％。此方法更为简便，快速，灵敏度高，适用于环境水样中锡的测定。
AFS-9700 dual channel atomic fluorescence spectrometry was adopted to determine the tin in water samples. The optimum instrument conditions were： negative high voltage 300V, atomizer height 8mm, lamp current of 80 mA, carrier gas flow rate 400ml/min and shielding gas flow of 900ml/min. The optimum pH proportion-volume fraction ratio is 4.0% of nitric acid medium and 20g/L potassium borohydride. The fluorescence intensity and concentration of tin in 1.00 - 10.0ug/L is linear, detection limit 0.010 ug/L, recovery rate 94.4% - 105% and RSD （n=7） 〈2.3%. This method is simple, rapid, sensitive and suitable for determine tin in environmental water samples.
出处
《环境科学与管理》
CAS
2011年第11期137-139,共3页
Environmental Science and Management
关键词
原子荧光光谱法
环境水样
锡
atomic fluorescence spectrometry
environmental water samples
tin
