摘要
本文报道了在溴化十六烷基三甲铵（ＣＴＭＡＢ）存在下，以５－溴水杨基荧光酮（５－ＢｒＳＡＦ）作为荧光试剂，用荧光熄灭法测定微量钼的新方法。详细研究了各种条件实验。反应的适宜酸度范围为 ０．０８－０．２４ｍ ｏｌ·Ｌ－ １ ＨＣｌ，钼含量在０－ ４．０μｇ／２５ｍ Ｌ范围内呈线性关系，配合物的组成比为Ｍｏ（Ⅵ）∶５－ＢｒＳＡＦ∶ＣＴＭＡＢ＝ １∶２∶２，激发波长为３６５ｎｍ ，发射波长为５２５ｎｍ 。方法灵敏度高，检出限为２．０μｇ／Ｌ。用于样品中微量钼的测定，结果令人满意。
A new method for fluoro\|quenching determination of trace Mo(Ⅵ) with 5 Bromo Salicyl Fluorone (5 BrSAF) and cetyltrimethyl ammonium bromide(CTMAB)has been described.The optimum condition is studied .Rectilinear range is 0-4.0μg/25mL in 0.08-0.24mol·L -1 HCl medium.The molar ratio of Mo(Ⅵ) to 5 BrSAF and CTMAB is 1∶2∶2.The excitation and emission wavelengths are 365nm and 525nm,respectively.The limiting detection is 2.0μg/L.The method proposed has been successfully applied to the direct determination of trace Mo(Ⅵ) in water samples.
出处
《光谱实验室》
CAS
CSCD
2000年第1期100-102,103,共4页
Chinese Journal of Spectroscopy Laboratory
基金
陕西省教委专项科学研究基金!资助课题(99Jk124)
关键词
钼
微量分析
荧光熄灭法
CTMAB
5-BrSAF
Molybdenum
5 Bromo Salicyl Fluorone
Cetyltrimethyl Ammonium Bromide
Fluorescence Quenching.
