膜富集-紫外光谱法快速检测自来水中痕量2-萘酚  

Rapid Detection of Trace Amount 2-Naphthol in Tapwater by Membrane Enrichment- UV Spectrometry

作　　者：李龙[1] 王海婷[2] 缪文彬[2] 王蕾[1] 蒋伟[2] 吴婷[1] 

机构地区：[1]华东理工大学上海市功能性材料化学重点实验室,上海200237 [2]上海出入境检验检疫局工业品与原材料检测技术中心,上海200135

出　　处：《分析测试学报》2016年第3期347-350,共4页Journal of Instrumental Analysis

基　　金：上海出入境检验检疫局2015年科研项目(HK012-2015);国家质检总局科技计划项目(2014IK077)

摘　　要：基于紫外光谱结合膜富集技术,提出了一种快速、灵敏检测自来水中2-萘酚的方法。以尼龙滤膜（孔径0.22μm）为富集材料,将富集到膜上的2-萘酚不经洗脱直接测定其漫反射紫外光谱,以实现定量分析目的。该方法方便快捷,大大提高了灵敏度。对pH值、样品体积和真空度等条件进行优化,并对方法的分析性能进行了评价。结果显示,2-萘酚的浓度与吸光度（波长为331 nm）在0.3-10 mg/L范围内用二次函数可得到良好的拟合关系,在0.3-1.0 mg/L和1.0-10 mg/L范围内呈分段的线性关系,相关系数（r2）分别为0.999 1和0.995 5。在最佳条件下,检出限达0.265 6 mg/L。该方法准确度和精密度较理想,适用于对自来水中2-萘酚的检测。A rapid,sensitive method based on membrane enrichment- solid phase UV spectrometry for the determination of 2-naphthol in tapwater was developed. The enrichment material is nylon membrane（ pore size： 0. 22 μm）. UV spectrum of 2-naphthol was acquired after enrichment without further treatment for quantitative analysis. The method is rapid and sensitive. The influences of pH value,sample volume,and vacuum degree were optimized,and the analysis capacity was evaluated. The result showed that there is a quadratic relationship between UV absorbance（ wavelength：331 nm） and concentration of 2-naphthol in the range of 0. 3- 10 mg / L. There are two linear relationships in the ranges of 0. 3- 1. 0 mg / L and 1. 0- 10 mg / L with correlation coefficients of 0. 999 1and 0. 995 5, respectively. Under the optimum conditions, the limit of detection（ LOD） was0. 265 6 mg / L. The accuracy and precision of the method are satisfactory,which could be used for the detection of 2-naphthol in tapwater.

关 键 词：膜富集 固相紫外光谱法 2-萘酚 水 

分 类 号：O657.3[理学—分析化学] O625.313[理学—化学]