聚乙烯醇增敏藏红T为探针的共振瑞利散射法测定阴离子表面活性剂
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摘要
在pH=4.0的柠檬酸-柠檬酸钠缓冲体系中,藏红T(ST)与十二烷基苯磺酸钠(SDBS)通过静电引力和疏水作用结合形成离子缔合物,再进一步与聚乙烯醇(PVA)形成三元复合物后,可使体系的共振瑞利散射强度显著提高,其最大散射强度位于340nm处。SDBS含量在0.15~5.0μg/mL范围内与共振瑞利散射强度增强值ΔI呈良好线性关系(R2=0.9969),检出限为8.6ng/mL,据此建立一种定量分析阴离子表面活性剂的共振瑞利散射新方法。探讨了影响因素和最佳实验条件,并将建立的方法应用于环境水样中阴离子表面活性剂的检测。该方法测得结果与国家标准方法相比较无显著性差异。
In citric acid-sodium citrate buffer solution(pH=4.0),sodium dodecylbenzenesulfonate(SDBS)and safranine T(ST)could form an ion-association complex by electrostatic attraction and hydrophobic effect,and further form a ternary ion-association complex with polyvinyl alcohol(PVA).The resonance Rayleigh scattering(RRS)intensities were significantly enhanced,and the maximum RRS wavelength was located at 340 nm.The scattering intensities(ΔI)were proportional to the concentration of SDBS over the range of 0.15-5.0μg/mL.The calibration curve wasΔI =1824.2-192.18c(μg/mL),R2=0.9969,and the detection limit was 8.6ng/mL.Accordingly,a RRS method to detect the concentration of anionic surfactants was established.The optimum conditions of the RRS method and the influence factors were investigated,and the method was applied to detect anionic surfactants in environmental water samples with satisfied results.The water samples were also detected by the national standard method,and there was no statistical difference in the results.
In citric acid-sodium citrate buffer solution(pH=4.0),sodium dodecylbenzenesulfonate(SDBS)and safranine T(ST)could form an ion-association complex by electrostatic attraction and hydrophobic effect,and further form a ternary ion-association complex with polyvinyl alcohol(PVA).The resonance Rayleigh scattering(RRS)intensities were significantly enhanced,and the maximum RRS wavelength was located at 340 nm.The scattering intensities(ΔI)were proportional to the concentration of SDBS over the range of 0.15-5.0μg/mL.The calibration curve wasΔI =1824.2-192.18c(μg/mL),R2=0.9969,and the detection limit was 8.6ng/mL.Accordingly,a RRS method to detect the concentration of anionic surfactants was established.The optimum conditions of the RRS method and the influence factors were investigated,and the method was applied to detect anionic surfactants in environmental water samples with satisfied results.The water samples were also detected by the national standard method,and there was no statistical difference in the results.
引文
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[4]CHEN S,OU M H,ZHAN Y G.Environmental Monitoring in China(陈飒,欧明晖,占永革.中国环境监测),2006,22(3):39.
[5]GUO S W,TIAN W W,SHAN Z P.PTCA(Part B:Chem Anal)(郭少为,田湾湾,单仲平.理化检验-化学分册),2016,52(6):660.
[6]ZHAO P,CHEN J H,XIAO J Z.Chinese Journal of Analytical Chemistry(赵萍,陈金辉,肖靖泽.分析化学),2009,37(12):1853.
[7]FAN X J,XU Y B.China Water and Waste Water(樊孝俊,徐义邦.中国给水排水),2015,31(2):98.
[8]Gao Z F,Song W W,Luo H Q,et al.Biosensors and Bioelectronics,2015,65:360.
[9]Liu S P,Wang F,Liu Z F,et al.Analytica Chimica Acta,2007,601:101.
[10]Cao Q E,Ding Z T,Fang R B,et al.Analyst,2001,126:1444.
[11]CHEN X H,L C Y,LIU H T,et al.Journal of Analytical Science(陈兴会,吕昌银,刘红涛,等.分析科学学报),2009,25(3):272.
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[14]WU Z J,LIU H N,ZHANG H F.Environmental Chemistry(吴志坚,刘海宁,张慧芳.环境化学),2010,29(6):997.
[15]WANG G,FENG Q L,XUE Z J,et al.Spectroscopy and Spectral Analysis(王高,冯巧玲,薛忠晋,等.光谱学与光谱分析),2013,33(3):752.
[16]Xu Q Y,Liu Z F,Hu X L.Analytica Chimica Acta,2011,707:114.
[17]XIE Y H.Research of Resonance Light Scattering in Analyzing Surfactants.Chengdu:Sichuan Normal University(谢永红.共振光散射光谱法在表面活性剂分析中的研究.成都:四川师范大学).2007.