分析测定大黄及其生境中重金属元素含量.docVIP

陕西理工学院毕业论文 分析测定大黄及其生境中重金属元素含量 作者：江德阳 （陕西理工学院化学与环境科学学院化学工程与工艺专业1101班 陕西汉中 723000） 指导教师：季晓晖 [摘要]目的：测定镇巴栽培的药用大黄（Rheum officinale Baill.）药材中有害重金属元素砷(As)、汞(Hg)、铅(Pb)、镉(Cd)的含量，为镇巴白河、清水俩地药用大黄（Rheum officinale Baill.）的质量提供科学依据。方法：氢化物发生原子荧光法测砷、汞;原子吸收分光光度法测铅、镉。结果：镇巴清水、白河2个产地栽培的药用大黄（Rheum officinale Baill.）中砷(As)、镉(Cd)、铅(Pb)、汞(Hg)的RSD3.0%符合国家相关规定。结论：实验分析侧定大黄中重金属既为镇巴大黄药材的质量评价提供资料，也为中药大黄中重金属含量提供参考。 [关键词] 大黄 重金属 土壤 原子荧光光谱法 原子吸收分光光度法 Determination of heavy metal elements in Rheum officinale and its habitat by Atomic Fluorescence Spectrometry Jiang deyang (Shaanxi University of Technology Chemical Engineering Institute Chemical engineering 1101 classes Hanzhoung City, Shaanxi Province 723000) Tutor：Ji Xiaohui Abstract:The Objective is Using to determine harmful heavy metals arsenic(As), mercury (Hg), lead (Pb), cadmium (Cd) content of Rheum officinale Baill. by atomic fluorescence spectrometry, and to provide scientific basis for its quality form Zhenba qingshui and baihe .This experiment is using Water by Hydride Generation Atomic Fluorescence Spectrometry. Results show that the quality certificate of Rheum officinale Baill. is right in conformity with national regulation,because the RSD is less than 3% of arsenic(As), mercury (Hg), lead (Pb), cadmium (Cd) form Rheum officinale Baill. Experimental analysis of side set in rhubarb heavy metals not only for quality evaluation of rhubarb Zhenba provide information, but also provided a reference for the heavy metal contents in rhubarb. Key word:Rheum officinale Baill. Heavy metals Soil AFS AAS TOC \o 1-3 \h \u HYPERLINK \l _Toc2502 1前言 PAGEREF _Toc2502 1 HYPERLINK \l _Toc21529 1.1研究目的与意义 PAGEREF _Toc21529 1 HYPERLINK \l _Toc14230 1.2中药大黄重金属含量超标的危害 PAGEREF _Toc14230 1 HYPERLINK \l _Toc2926 1.2.1砷超标的危害 PAGEREF _Toc2926 1 HYPERLINK \l _Toc1001 1.2.2汞超标的危害 PAGEREF _Toc1001 1 HYPERLINK \l _Toc12704 1.2.3铅超标的危害 PAGEREF _Toc12704 1 HYPERLINK \l _Toc18806 1.2.4镉超标的危害 PAGEREF _Toc18806 1 HYPERLINK \l _Toc11187 1.3中药大