###
中国无机分析化学:2019,9(4):36-39
←前一篇   |   后一篇→
本文二维码信息
码上扫一扫!
EDTA滴定法测定萤石中氟化钙含量的方法改进
(长春黄金研究院有限公司)
An improved method for determination of calcium fluoride in fluorite by EDTA titration
(Changchun gold research institute co. LTD)
摘要
图/表
参考文献
相似文献
本文已被:浏览 442次   下载 507
投稿时间:2019-03-01    修订日期:2019-03-11
中文摘要: 研究建立了EDTA滴定法测定矿石中氟化钙的方法。本方法的改进在于,引入了钙乙酸为溶解试样的溶剂,溶解样品中的碳酸钙,同时,通过同离子效应减少氟化钙的溶解度。实验中探究了钙离子的浓度与氟化钙溶解度的关系,通过对比试验确定选择了含钙乙酸的最佳浓度。同时,对实验中的其他条件也进行了相应的探究与优化。此方法的精密度均小于9%,准确度均小于10%。
中文关键词: 萤石  EDTA  容量法  氟化钙
Abstract:A method for determination of calcium fluoride in ore by EDTA titration was established. Calcium acetate was introduced as the solvent to dissolve the sample, calcium carbonate in the sample was dissolved, and the solubility of calcium fluoride was reduced by the same ion effect. In the experiment, the relationship between the concentration of calcium ions and the solubility of calcium fluoride was explored, and the optimal concentration (10 g/L) containing calcium acetic acid was determined through comparative experiment. At the same time, other conditions in the experiment were also explored and optimized, and the optimal experimental conditions were determined as follows: the minimum weighing sample size was 0.5 g. Washing and precipitation water consumption is about 50 mL; The washing times of the second filtration were 8~10 times.The amount of potassium hydroxide added in titration was 20 mL. The precision (0.10%) and accuracy (0.08%) of the method can meet the experimental requirements.
文章编号:     中图分类号:    文献标志码:
基金项目:
引用文本:
张越.EDTA滴定法测定萤石中氟化钙含量的方法改进[J].中国无机分析化学,2019,9(4):36-39.
zhangyue.An improved method for determination of calcium fluoride in fluorite by EDTA titration[J].Chinese Journal of Inorganic Analytical Chemistry,2019,9(4):36-39.

我们一直在努力打
造,精品期刊,传
播学术成果

全国咨询服务热线
86-10-63299759

杂志信息

期刊简介

相关下载

联系我们

电话:010-63299759

传真:010-63299754

QQ:XXXXXXX

Email:zgwjfxhx@163.com

邮编:100160

地址:北京市南四环西路188号总部基地十八区23号楼

关注微信公众号