A nanosilver-based spectrophotometric method for determination of malachite green in surface water samples
A nanosilver-based spectrophotometric method for determination of malachite green in surface water samples
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DOI：
10.1007/s10661-012-2986-1
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发表时间：
2013-07
影响因子：
3
通讯作者：
Reza Sahraei;Abbas Farmany;S. S. Mortazavi-S.;H. Noorizadeh
中科院分区：
文献类型：
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作者：
Reza Sahraei;Abbas Farmany;S. S. Mortazavi-S.;H. Noorizadeh
本文报道了一种测定地表水中纳摩尔级孔雀石绿色的新方法。该方法是基于在醋酸-醋酸介质中，纳米银对六氰合铁（III）氧化孔雀石绿绿色的催化作用。采用固定时间法在610 nm处测定吸光度。在最佳条件下，孔雀石绿色的线性范围为8.0 × 10−9 ~ 2.0 × 10− 7 mol L− 1，相关系数为0.996。检测限（S/N= 3）为2.0 × 10− 9 mol L−1。1.0 × 10− 8 mol L− 1孔雀石绿色重复测定10次的相对标准偏差为1.86%。该方法不需任何预富集分离步骤，具有良好的准确度和重现性，可用于地表水中孔雀石绿色的测定。
A new spectrophotometric method is reported for the determination of nanomolar level of malachite green in surface water samples. The method is based on the catalytic effect of silver nanoparticles on the oxidation of malachite green by hexacyanoferrate (III) in acetate–acetic acid medium. The absorbance is measured at 610 nm with the fixed-time method. Under the optimum conditions, the linear range was 8.0 × 10−9–2.0 × 10−7mol L−1malachite green with a correlation coefficient of 0.996. The limit of detection (S/N= 3) was 2.0 × 10−9mol L−1. Relative standard deviation for ten replicate determinations of 1.0 × 10−8mol L−1malachite green was 1.86 %. The method is featured with good accuracy and reproducibility for malachite green determination in surface water samples without any pre-concentration and separation step.