分光光度法测定鄱阳湖野生藜蒿中的微量铅  

Spectrophotometric Determination of Trace Lead of Wild Artemisia selengensis in Poyang Lake

作　　者：朱寿民[1] 韩文华[1] 樊后保[2] 王幸斌[1] 

机构地区：[1]景德镇高等专科学校生物与化学工程系,景德镇333000 [2]南昌工程学院生态与环境科学研究所,南昌330029

出　　处：《华中农业大学学报》2005年第6期596-598,共3页Journal of Huazhong Agricultural University

基　　金：国家自然科学基金项目(30370259)资助

摘　　要：采用高频电场激发氧灰化溴代卟啉分光光度法,测定了鄱阳湖野生藜蒿中铅的含量.在0.08 mol/LNaOH介质中,铅与溴代卟啉试剂形成1:2橙黄色配合物,最大吸收波长在479 nm,表观摩尔吸光系数为2.2×105.铅量在0.04～0.48μg/mL内符合比耳定律,可用于鄱阳湖野生藜蒿中的铅的测定.测定结果表明,鄱阳湖区取样土壤已受到重金属铅的轻微污染,样品野生藜蒿中含有较低浓度的铅.A method of the determination of absorbed lead in wild Artemisia selengensis （a wild plant growing in wet soil whose tender stem is edible） in Poyang Lake with T（DBHP）P is reported in this paper. The complex-formation reaction in 0. 08 mol/L NaOH solution can be accelerated at room temperature in the presence of oxine. The soret band lies at 479 nm with an apparent molar absorptivity of 2. 2×10^5. Beer＇s law is obeyed for 0--12 μg of lead in 25 mL of solution. The method has been applied for the determination of micro amount of absorbed lead of wild Arteia selengensis with satisfactory results. The results indicates wild Artemisia selengensis has been polluted by Pb slightly.

关 键 词：二溴羟基卟啉 分光光度法 铅 野生藜蒿 

分 类 号：TS207.51[轻工技术与工程—食品科学]