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）

第34卷第1期2018年2月中国环境监测EnvironmentalMonitoringinChinaVo1．34NO．1Feb．2O18巯基棉分离富集一偶氮氯膦m—TPB一共振光散射测定垃圾渗滤液中的Zn(Ⅱ)庞向东，江虹，何婷婷，秦艾，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)的巯基棉分离富集一偶氮氯膦Ⅲ一溴代十六烷基吡啶(TPB)共振光散射新方法。在pH为3．1—4．6的Tris一盐酸缓冲介质及TPB存在下，zn(Ⅱ)与偶氮氯膦II—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378nm处，体系的RLS增强程度(△，R1．s)与0．008～0．20mg／L范围内的Zn(1I)呈线性关系，定量限为0．010mg／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％。关键词：分离富集；偶氮氯膦Ⅲ；溴代十六烷基吡啶；Zn(II)；共振散射中图分类号：X830．2；0657．3文献标志码：A文章编号：1002—6002(2018)01—0127·05DOI：10．19316／j．issn．1002—6002．2018．01．17DeterminationofTraceZinc(Ⅱ)inLandfillLeachatebyResonanceLightScatteringMethodwithAzoChlorinationⅢ-HexadecylpyridiniumBromideafterSulfhydrylCottonSeparationandPreconcentractionPANGXiangdong，JIANGHong，HETingting，QINAi，HONGXinCollegeofChemistryandChemicalEngineering，CollaborativeInnovationCentreforGreenDevelopmentinWulingMountainAreas，YangtzeNormalUniversity，Chongqing408100，ChinaAbstract：Anewresonancelightscatteringmethodofazochlorination1I—hexadecylpyridiniumbromide(TPB)forquantifyingzinc(II)inlandfillleachateaftersulfhydrylcottonseparationandprec0ncentr8tionwasdeveloped．InanacidicTris—HydrochloricacidbufermediumofpH3．1-4．6andintheexistenceofhexadecylpyridiniumbromide，zinc(II)canbeboundwithazochlorinationⅢ一hexadecy1pyridiniumbromidetoformaternarycomplexes，whichledtoadistinctlyenhancedresonancelightscattering(RLS)ofsystemandtheappearanceofanewRLSspectrum．Themaximumresonancelightscatteringpeakwaslocatedat378nm，theresonancelightscatteringenhanceintensity(A，RLs)wasdirectlyproportionaltothemassconcentrationofzinc(1I)intherangeof0．008to0．20mg／Lwiththelimitofquantitationbeingof0．010mg／L．Thespectrumcharacteristicsofresonancelightscatteringandoptimumreactionconditionsandthechiefpropertiesofanalyticalchemistrywerestudied．Themethodhasbeenappliedtothedeterminationoftracezinc(II)inlandfillleachatewithspikedrecoveriesandRSDfoundwereintherangesof98．10％一102．7％and1．5％一1．8％respectively．Keywo