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巯基棉分离富集-偶氮氯膦Ⅲ-TPB-共振光散射测定垃圾渗滤液中的Zn(Ⅱ)
Determination of Trace Zinc (Ⅱ) in Landfill Leachate by Resonance Light Scattering Method with Azo Chlorination Ⅲ-Hexadecylpyridinium Bromide after Sulfhydryl Cotton Separation and Preconcentraction
投稿时间:2016-08-31  修订日期:2016-11-13
DOI:10.19316/j.issn.1002-6002.2018.01.17
中文关键词:  分离富集  偶氮氯膦Ⅲ  溴代十六烷基吡啶  Zn(Ⅱ)  共振散射
英文关键词:separation and preconcentration  azo chlorination Ⅲ  hexadecylpyridinium bromide  zinc(Ⅱ)  resonance scattering
基金项目:重庆市教委科技基金资助项目(KJ1401226);长江师范学院科技基金资助项目(2016CXX088)
作者单位
庞向东 长江师范学院化学化工学院, 长江师范学院武陵山片区绿色发展协同创新中心, 重庆 408100 
江虹* 长江师范学院化学化工学院, 长江师范学院武陵山片区绿色发展协同创新中心, 重庆 408100 
何婷婷 长江师范学院化学化工学院, 长江师范学院武陵山片区绿色发展协同创新中心, 重庆 408100 
秦艾 长江师范学院化学化工学院, 长江师范学院武陵山片区绿色发展协同创新中心, 重庆 408100 
洪歆 长江师范学院化学化工学院, 长江师范学院武陵山片区绿色发展协同创新中心, 重庆 408100 
通讯作者:江虹*  长江师范学院化学化工学院, 长江师范学院武陵山片区绿色发展协同创新中心, 重庆 408100  
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中文摘要:
      建立了测定垃圾渗滤液中微量Zn(Ⅱ)的巯基棉分离富集-偶氮氯膦Ⅲ-溴代十六烷基吡啶(TPB)共振光散射新方法。在pH为3.1~4.6的Tris-盐酸缓冲介质及TPB存在下,Zn(Ⅱ)与偶氮氯膦Ⅲ-TPB结合生成三元缔合物,使共振光散射(RLS)显著增强并产生新的散射光谱,最大RLS散射峰位于378 nm处,体系的RLS增强程度(△IRLS)与0.008~0.20 mg/L范围内的Zn(Ⅱ)呈线性关系,定量限为0.010 mg/L。研究了共振光散射的光谱特征、适宜的反应条件及主要分析化学性质。方法用于垃圾填埋场渗滤液中Zn(Ⅱ)的测定,加标回收率为98.10%~102.7%,相对标准偏差为1.5%~1.8%。
英文摘要:
      A new resonance light scattering method of azo chlorination Ⅲ-hexadecylpyridinium bromide(TPB) for quantifying zinc(Ⅱ) in landfill leachate after sulfhydryl cotton separation and preconcentration was developed. In an acidic Tris-Hydrochloric acid buffer medium of pH 3.1-4.6 and in the existence of hexadecylpyridinium bromide, zinc(Ⅱ) can be bound with azo chlorination Ⅲ-hexadecylpyridinium bromide to form a ternary complexes, which led to a distinctly enhanced resonance light scattering (RLS) of system and the appearance of a new RLS spectrum. The maximum resonance light scattering peak was located at 378 nm, the resonance light scattering enhance intensity (△IRLS) was directly proportional to the mass concentration of zinc(Ⅱ) in the range of 0.008 to 0.20 mg/L with the limit of quantitation being of 0.010 mg/L. The spectrum characteristics of resonance light scattering and optimum reaction conditions and the chief properties of analytical chemistry were studied. The method has been applied to the determination of trace zinc(Ⅱ) in landfill leachate with spiked recoveries and RSD found were in the ranges of 98.10%-102.7% and 1.5%-1.8% respectively.
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