| 共振瑞利散射法测定尿中痕量砷 |
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| 引用本文： | 黄亚励,徐红,刘红.共振瑞利散射法测定尿中痕量砷[J].应用化工,2010,39(1):124-126. |
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| 作者姓名： | 黄亚励 徐红 刘红 |
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| 作者单位： | 贵阳医学院,化学教研室,贵州,贵阳,550004 |
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| 基金项目： | 贵州省卫生厅2000年度优秀医学青年科技人才专项科研基金项目 |
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| 摘 要： | 建立了一种测定尿中痕量砷的共振瑞利散射(RRS)新方法。在pH=5.6的HAc-NaAc缓冲溶液中,I3-与硫酸耐而蓝生成稳定的离子缔合物,体系共振瑞利散射增强。当加入微量As(Ⅲ)时,碘能定量氧化As(Ⅲ),导致共振瑞利散射减弱,在0.10~4.0μg/25 mL浓度范围内,共振瑞利散射强度的改变值ΔIRRS与As(Ⅲ)浓度呈线性关系,方法检出限为1.65μg/L。用于尿中痕量砷的测定,回收率为93.5%~106.7%。
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| 关 键 词： | 共振瑞利散射 砷(Ⅲ) 硫酸耐而蓝 I3- |
Determination of urinary arsenic by resonance Rayleigh scattering method |
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| HUANG Ya-li,XU Hong,LIU Hong.Determination of urinary arsenic by resonance Rayleigh scattering method[J].Applied chemical industry,2010,39(1):124-126. |
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| Authors: | HUANG Ya-li XU Hong LIU Hong |
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| Affiliation: | Department of Chemistry;Guiyang Medical College;Guiyang 550004;China |
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| Abstract: | A resonance Rayleigh scattering method is proposed for the determination of urinary arsenic,I_3~- reacts with Nile blue sulphate to form an ion-association complex in the buffer of HAc-NaAc.The decrease of resonance Rayleigh scattering intensity is linear to the concentration of arsenic(Ⅲ) in the range of 0.10~4.0 μg/25 mL with the detection limit of 1.65 μg/L.The method was applied to the determination of urinary arsenic with satisfactory results.The recoveries obtained were 93.5%~106.7%. |
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| Keywords: | I_3~- resonance Rayleigh scattering Nile blue sulphate I_3~- |
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