十二烷基苯磺酸钠-吖啶橙体系的共振光散射和二级散射光谱及其分析应用  

Resonance Light Scattering and Second-order Scattering Spectra of Sodium Dodecylbenzene Sulfonate-Acridine Orange System and Their Analytical Application

作　　者：肖锡林[1] 王永生[1] 刘传湘[2] 杨慧仙[1] 李贵荣[1] 吕昌银[1] 

机构地区：[1]南华大学公共卫生学院,湖南衡阳421001 [2]南华大学化学化工学院,湖南衡阳421001

出　　处：《分析测试学报》2005年第2期28-31,共4页Journal of Instrumental Analysis

基　　金：湖南省教育厅科研基金课题(资助号 01C213)

摘　　要：研究了阴离子表面活性剂(AS)十二烷基苯磺酸钠(SDBS)与吖啶橙(AO)作用的共振光散射(RLS)、二级散射(SOS)和反二级散射(ASOS)光谱,并建立了AO共振光散射法和SOS、ASOS法水相直接测定环境水样中AS的新方法.结果表明:(1)在pH 1.8～4.0的范围内,加入SDBS导致AO共振光散射剧烈增强,在λem=λex=537nm处,存在一RLS峰,其强度与SDBS的浓度成线性关系,据此建立了一种测定水中AS(以SDBS计)的RLS法.在2.5×10-5mol/L的AO存在下,方法的线性范围为0.028～8.71mg/L,检出限为8.36μg/L.用该法测定了环境水样中的AS,结果满意.(2)当λem=321 nm,λex=642nm时,在0.014～8.71 mg/L含量范围内,△Isos与溶液中物质的浓度成正比,线性相关系数为0.993,检出限为4.31μg/L;当λem=642 nm,λex=321nm时,在0.050～8.71mg/L范围内,△Isos与溶液中物质的浓度成正比,线性相关系数为0.993,检出限为14.9μg/L.The resonance light scattering(RLS),second - order scattering(SOS)and anti - second order scatˉtering(ASOS)spectra of sodium dodecylbenzene sulfonate(SDBS)with acridine orange(AO)system were studied.Experimental results showed that whenλ em =λ ex =537nm,the RLS peak of AO was greatly enˉhanced with the increase of SDBS concentration at a pH range of1.8～4.0.The linear range of the calibraˉtion curve for SDBS was0.028～8.71mg/L with a detection limit of8.36μg/L when the AO concentration was2.5×10 -5 mol/L.The method has been applied to the determination oftrace amountof ASin environmenˉtal water samples with satisfactory results.In addition,whenλ em =321nm andλ ex =642nm,the intensity of ASOSwas proportional to the SDBSconcentration rangingfrom0.014～8.71mg/L,and the correlation coeffiˉcient was0.993with a detection limit of4.31μg/L;whenλ em =642nm andλ ex =321nm,the intensity of SOS was proportional to the SDBS concentration ranging from0.050～8.71mg/L,and the correlation co- efficient was0.993with a detection limit of14.9μg/L.

关 键 词：阴离子表面活性剂 吖啶橙 共振光散射 二级散射 

分 类 号：O657.3[理学—分析化学]