| HNO_3-HClO_4湿消化的EDTA减量滴定法快速测定饲料中微量铜 |
| |
| 引用本文： | 王瑞斌,刘士义.HNO_3-HClO_4湿消化的EDTA减量滴定法快速测定饲料中微量铜[J].安徽农业科学,2006,34(15):3570-3571. |
| |
| 作者姓名： | 王瑞斌 刘士义 |
| |
| 作者单位： | 1. 榆林学院化学与化学工程学院,陕西,榆林,719000
2. 陕西省榆林市畜牧研究所,陕西,榆林,719000 |
| |
| 基金项目： | 本文承蒙陕西师范大学化学与材料科学学院院长、博士生导师张成孝教授的指导,谨致谢忱. |
| |
| 摘 要： | 采用HNO3-HClO4湿消化的EDTA减量滴定法测定饲料中的微量铜。即样品用HNO3-HClO4湿消化后,先在pH值5~6时,以二甲酚橙为指示剂,用EDTA标准溶液测定金属离子的总量;然后在另一份试样中,用硫脲掩蔽铜,再用EDTA标准溶液测定铜以外的其他金属离子;两者之差即相当于铜的量。结果表明,该方法没有干扰,准确度高,适用性强,样品消化快捷,测定方法简单,终点易于判断,测定结果的相对标准偏差(RSD)为=0.47%,回收率(R)在98.4%~101.2%。
|
| 关 键 词： | 湿消化 EDTA 减量法 饲料 硫脲 铜测定 |
| 文章编号： | 0517-6611（2006）15-3570-02 |
| 收稿时间： | 04 29 2006 12:00AM |
| 修稿时间： | 2006-04-29 |
Determining Method of Copper in the Feed with the HNO3-HClO4 Wet Diction and EDTA Titration |
| |
| WANG Rui-bin et al.Determining Method of Copper in the Feed with the HNO3-HClO4 Wet Diction and EDTA Titration[J].Journal of Anhui Agricultural Sciences,2006,34(15):3570-3571. |
| |
| Authors: | WANG Rui-bin |
| |
| Institution: | School of Chemistry and Chemical Engineefing, Vulin College,Vulin,Shaanxi 719000 |
| |
| Abstract: | The study on the determining method of copper in the feed with the EDTA was carried out.After the sample was digested with HNO_3-HClO_4,while the pH was 5～6 and the XO was used as the indicator,the total of the metal ions was tested with the standard solution of EDTA,and another sample was added with the thiourea to protect Cu~(2+) and then the ions except Cu~(2+) was titrated by means of EDTA.The amount of the copper was determined through the balance between two values.The result showed it was not disturbed and with the high accuracy,applicability better,sample digest fast,easy-determination and the end point was easily estimated.RSD=0.47%,and R was between 98.4% and 101.2%. |
| |
| Keywords: | Wet digestion EDTA Feed Thiourea Determination of copper |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
