| 瑞利光散射技术快速测定萝卜红色素中痕量Pb(Ⅱ) |
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| 引用本文： | 秦艾,陈庆,陈娥,何小琴,高庆玲,江虹.瑞利光散射技术快速测定萝卜红色素中痕量Pb(Ⅱ)[J].分析科学学报,2017,33(4). |
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| 作者姓名： | 秦艾 陈庆 陈娥 何小琴 高庆玲 江虹 |
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| 作者单位： | 长江师范学院化学化工学院,重庆,408100 |
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| 基金项目： | 重庆市教委科技基金，长江师范学院科技基金 |
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| 摘 要： | 建立了快速测定Pb(Ⅱ)的瑞利散射(RLS)新方法。在Tris-HCl缓冲介质中,溴化十六烷基三甲基铵(CTMAB)增敏溴甲酚绿(BCG),使瑞利散射显著增强,最大瑞利散射峰位于345nm,CTMAB-BCG进一步与Pb(Ⅱ)结合后生成的三元复合物的瑞利散射增强程度(|ΔIRLS|)与0.006~0.41mg/L范围Pb(Ⅱ)的质量浓度呈线性关系,定量限为0.053mg/kg。方法用于萝卜红色素中Pb(Ⅱ)的测定,回收率为98.5%~102%,相对标准偏差为1.8%~2.5%。
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| 关 键 词： | 萝卜红色素 Pb(Ⅱ) 溴甲酚绿 CTMAB 瑞利散射 |
Fast Determination of Trace Lead in Radish Red Pigment by Rayleigh Light Scattering Technique |
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| QIN Ai,CHEN Qing,CHEN E,HE Xiao-qin,GAO Qing-ling,JIANG Hong.Fast Determination of Trace Lead in Radish Red Pigment by Rayleigh Light Scattering Technique[J].Journal of Analytical Science,2017,33(4). |
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| Authors: | QIN Ai CHEN Qing CHEN E HE Xiao-qin GAO Qing-ling JIANG Hong |
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| Abstract: | A new and fast Rayleigh light scattering method for detection of Pb(Ⅱ) was developed.In trishydrochloric acid buffer medium,bromocresol green was sensitized with cetyltrimethyl ammonium bromide(CTMAB),which led to a distinctly enhanced Rayleigh scattering(RLS).The maximum RLS peak was located at 345 nm.In the presente of Pb (Ⅱ),the RLS intensity (| ΔIRLs ) was directly proportional to the concentration of Pb (Ⅱ) in the range of 0.006-0.41 mg/L with the limit of quantitation 0.053 mg/kg.The method has been applied to the determination of trace lead in radish red pigment with the recovery of 98.5％-102％ and RSD of 1.8％-2.5％. |
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| Keywords: | Radish red pigment Lead Bromocresol green CTMAB Rayleigh scattering |
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