分光光度分析法快速测定工业废水中金属离子铁和铜
关键词：二乙基二硫代氨基甲酸钠法；邻菲罗啉分光光度法；铁的含量；铜的含量
Detection of Iron And Copper Ions In Industrial Waste Water By Spectrophotometer
Abstract: This thesis introduces the determination of waste water of industrial by diethyl dithiocarbamate spectrophotometric as well as the total content of copper phenanthroline spectrophotometry industrial waste water total iron content of the experimental method. Experiments in the determination of copper content found extractant with polysorbate instead of carbon tetrachloride more quickly and efficiently; and by comparison of the actual data, to discuss an improved method of complex compounds better stability. In the determination of iron content in wastewater experiments reference GB (GB7474-87) method, discovered by the ratio of the reagents becomes 10% hydroxylamine hydrochloride 3mL, 0.1% phenanthroline 5mL, 1mol / L sodium acetate buffer solution 3mL available reduction of the high iron more complete, better stability, its high measurement precision and accuracy, suitable for promotion of industrial waste water and the use of detection system.
Keywords：Sodium diethyldithiocarbamatre；1,10-Phenanthroline monohydrate iron；iron content；copper content
目 录
1绪论 1
1.1研究背景及意义 1
1.2.1 721可见分光光度计仪器的使用方法 3
1.2.2 注意事项及过程要求 4
1.3 本课题研究内容 5
2 实验部分 7
2.1 仪器与试剂 7
2.1.1 实验仪器 7
2.2 实验原理 8
2.2.1测定铜离子实验原理 8
2.2.2测定铁离子实验原理 8
2.3 实验方法 9
2.3.1测定铜离子的实验方法 9
2.3.2 测定铁离子的实验方法 10
3 结果与讨论 11
3.1铜离子的测定 11
3.1.1最大吸收波长的测定 11
3.1.2 缓冲溶液pH值的影响 11
3.1.3 掩蔽剂(EDTA-柠檬酸铵溶液)缓冲溶液加入量 12
3.1.4 显色剂的加入量对吸光度的影响 13
3.1.5 铜标准曲线的绘制 13
3.1.5 铜标准曲线的绘制 14
3.1.6 水样测定 14
3.1.7 铜样品加标回收率的测定 15
3.1.8 显色时间对吸光度的影响（络合物的稳定性） 16
3.2 实验方案的改进 16
3.2.1 实验方法 16
3.2.2 实验条件的选取 16
3.2.3 标准曲线的绘制 20
3.2.4 水样测定 21
3.2.5 铜离子加标回收率的测定 22
3.2.6 络合物的稳定性 22
3.2.7 模拟样品试验 23
3.3 铁离子的测定 25
3.3.1 最大吸收波长的测定 25