学校代码: 学 号:
Hefei University
毕业设计(论文)
BACHELOR DISSERTATION
论文题目: EDTA滴定法则测定水中总硬度的几点体会
学位类别:
学科专业: 作者姓名: 导师姓名: 完成时间:
1
EDTA滴定法则测定水中总硬度的几点体会
中文摘要
EDTA滴定法则是水中的总硬度具有仪器廉价、步骤简单。操作方便、准
确可靠等特点,是环境监测中通常采用的方法。通过大量的实验,对具体操作中有关问题进行探讨,发现了实验过程中有几方面需引起注意,并对数据准确可靠具有一定的保证。
关键词:总硬度; EDTA 滴定法; 测定; 体会
Some experience of determination of total hardness in water by
EDTA titration
Chinese abstract
EDTA titration rule is that the total hardness of water is cheap and simple. The operation is convenient, accurate and reliable, and so on. It is usually used in environmental monitoring. Through a large number of experiments, the specific operation of the relevant issues to explore, found that there are
several aspects of the experimental process need to pay attention to, and the accurate and reliable data with a certain guarantee.
Key word:Total hardness;EDTATitration method;Determination;Experience
2
学位类别:学士学位 ................................................................................... 1 第一章 前言 ................................................................................................ 4 第二章 测定水中的总硬度 .......................................................................... 4
1.试剂与仪器 ........................................................................................ 4 2.实验方法与结果 ................................................................................ 4
2. 1 样品测定 ............................................................................. 4 2. 2 精密度和准确度检验 .......................................................... 4 3.实验讨论 ........................................................................................... 5
3. 1 调节PH 值 ......................................................................... 5 3. 2 加入铬黑T 指示剂后,应尽快完成滴定 ........................... 5 3. 3 滴定过程时应特别注意以下问题 ........................................ 5 3. 4 水样中干扰物质的消除 ....................................................... 6 3. 5 缓冲溶液 ............................................................................. 6
参考文献 ...................................................................................................... 7 致 谢 ....................................................................................................... 8
3