摘要
用乙二胺四乙酸二钠-氯化钙中性混合液络合掩蔽试样中高含量的铁,以溴甲酚绿-甲基红为指示剂,用氢氧化钠标准溶液滴定至试样溶液由红色变为亮绿色为终点。
EDTA-calcium chloride neutral mixture is used for the complexing masking the high-content iron,bromocresol green-methyl red is used as an indicator,and sodium hydroxide standard solution is used in the ti-tration until the sample solution turns from red to bright green,thus reaching the end point.
作者
王贤果
Wang Xianguo(Yunnan Yongchang Lead and Zinc Co.,Ltd.,Baoshan 678307,China)
出处
《有色金属设计》
2019年第3期50-53,共4页
Nonferrous Metals Design
