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在 0 .1 2 mol/L H2 SO4 介质中 ,As( )、Mo( )与罗丹明 B形成砷钼杂多酸 /罗丹明 B三元缔合物 ,它在 λex/λem为 32 5nm/650 nm波长处产生一个灵敏的二级散射峰。据此建立了一个测定 1~ 2 0 ng/m L As的二级散射光谱分析新方法。本法具有灵敏度高、选择性好、操作简便等特点
In 0. 1 2 mol / L H2 SO4 medium, As (), Mo () and Rhodamine B form arsenic molybdenum heteropolyacid / rhodamine B ternary complex, which λex / λem is 32 5nm / 650 A sensitive second-order scattering peak is generated at nm wavelength. A new method for the determination of 1 ~ 20 ng / m L As by secondary scattering spectroscopy was established. This method has high sensitivity, good selectivity, easy operation and so on