【作者】 乔凤霞；

【导师】 孙汉文；

【作者基本信息】 河北大学 ， 分析化学， 2004， 硕士

【摘要】 氢化物发生-原子荧光光谱法具有检出限低、灵敏度高和可同时进行多元素分析等特点在痕量和微量元素分析的工作中发挥着越来越重要的作用。本文主要研究利用氢化物发生-原子荧光光谱技术在测定中草药和农作物中的微量元素砷、硒、锡、锑的应用。 全文分为： 第一章：对氢化物发生-原子荧光光谱法的原理、历史、现状及新进展等情况进行了评述，并对其应用前景加以展望，引用文献50篇。 第二章：采用L-半胱氨酸做预还原剂，建立了氢化物发生-原子荧光法同时测定砷锑的新方法。成功地测定了环境水样和中草药样品中的总砷，砷(Ⅲ)，总锑和锑(Ⅲ)；并采用索氏提取技术和正辛醇-水萃取技术对砷、锑形态在中药中的分布特征进行了分析研究。 第三章 采用超生波辅助水提取技术，以盐酸羟胺作预还原剂，建立了氢化物发生原子荧光法同时测定砷、硒的方法，并用于枸杞子中的砷、硒的测定和形态分布特征研究。 第四章 以十二烷基磺酸钠(SDS)作增敏剂，建立了在弱酸性介质条件下氢化物发生原子荧光法测定土壤中痕量锡的新方法，并研究了在土壤-水稻系统中微量元素锡的富集和分布特征。更多还原

【Abstract】 A method, hydride generation atomic fluorescence spectrometry, for the determination of trace elements places more and more role in many fields, for its low detection limit, high sensitivity and simultaneously detected many elements. This paper focuses on the application of hydride generation atomic fluorescence spectrometry in determination of arsenic, selenium, tin and antimony in Chinese herbs and cropper. The paper consists of four chapters.In chapter 1, the fundamental principle, history and the application progress of atomic fluorescence spectrometry are reviewed .with 50 references.In Chapter 2, A new method was developed for simultaneous determination of trace arsenic and antimony in water and Chinese herbal medicines by hydride generation-atomic fluorescence spectrometry with L-cysteine as the prereductant. A Soxhlet extraction system and a n-octanol-water extraction system were employed for speciation analysis and research of As and Se in Chinese herbs.In Chapter 3, a new method was developed for simultaneous determination of trace arsenic and selenium in lycium barbarum L. by hydride generation atomic fluorescence spectrometry, with hydrochloric hydroxylamine as the prereductant. A ultrasonic extraction was employed for the speciation and distribution of arsenic and selenium.In chapter 4, a new method is developed for the determination of trace tin in soil by hydride generation fluorescence spectrometry with sodium dodecanesulfonate (SDS) as the sensitizing reagent, the concentration and distribution of trace tin in soil-paddy system was investigated.更多还原