微乳液介质中三甲氧基苯基荧光酮与镉的光谱行为的研究

研究了CTMAB-OP微乳液介质存在下，镉与三甲氧基苯基荧光酮的光谱行为，在pH 10.40 硼砂-NaOH的缓冲溶液中，镉与三甲氧基苯基荧光酮(TM-PF)显色生成稳定的1∶2 配合物，于560 nm 处摩尔吸光系数为6.10×104 L·mol-1·cm-1，镉含量在0～0.60 μg·mL-1 范围内符合比耳定律。采用巯基葡聚糖凝胶分离富集，消除了共存离子的干扰，显著提高了方法的选择性和灵敏度，使方法具有高的选择性和高的灵敏度，该方法成功地用于环境样品中痕量镉的测定。

Study on Spectral Behavior of Trimethoxyphenylflurone with Cadmium in Microemulsion

In the present paper, the spectral behavior of cadmium with trimethoxyphenylflurone (TM-PF) in microemulsion was studied. In the buffer medium of borax-NaOH at pH 10.40，cadmium (Ⅱ) reacts with TM-PF to form a stable 1∶2 complex. Its apparent molar absorptivity is 6.10×104 L·mol-1·cm-1 at 560 nm. Beer’s law is obeyed in the range of 0-0.60 μg·mL-1. The coexistent metal ions can be separated, and cadmium can be enriched by sulfhydryl dextrane gel (SDG), greatly improving the selectivity and sensibility of the system. The method possesses high sensitivity as well as high selectivity, and can be used to determine trace amount of cadmium in environmental samples successfully.