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中文摘要：
在HAc—NaAc缓冲溶液条件下，金纳米微粒在波长540nm处有一个较强的共振散射峰，加入孔雀绿（MG）后体系在630nm的共振散射峰强烈降低。二价锰离子对高碘酸钾氧化孔雀绿褪色反应具有催化作用，随着二价锰离子浓度增大，630nm的共振散射峰线性增强，其增强值△I630nm与锰离子浓度在2．0～54．9ng／mL范围内呈线性关系，相关系数为0．9967，方法的检出限为0．5ng／mL，考察了试剂用量并进行了常见离子干扰试验，由此建立了催化共振散射光谱测定锰的方法。该法用于测定废水中二价锰离子的含量，结果同原子吸收光谱法的测定值相吻合。
英文摘要：
In HAc-NaAc buffer solution, gold nanoparticles exhibited a strong resonance scattering （RS） peak at 540 nm. When machilate green （MG） was added, the RS intensity at 630 nm decreased considerably. Mn（Ⅱ） has catalytic effect on the fading reaction between MG and KIO4. With addition of Mn（Ⅱ）, the RS intensity at 630 nm increased. The increased RS intensity was linear to the Mn（Ⅱ） concentration in the range of 2.0--54.9 ng/mL with a correlation coefficient of 0. 996 7. The detection limit of this method was 0.5 ng/mL. The effect of reagent concentrations and the interference of foreign ions were tested. Accordingly, a catalytic RS spectral method for determination of Mn（Ⅱ） has been proposed. The proposed method has been applied to the determination of Mn（Ⅱ） in waste water, whose results were in agreement with those of atomic absorption spectrometry.
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