摘要
利用H2SO4-K2Cr2O7混合标准溶液作为氧化剂,将磷矿石在沸水浴中加热回流氧化其中的有机碳,用硫酸亚铁铵标准滴定溶液回滴过量的H2SO4-K2Cr2O7溶液,测定磷矿石中有机碳的含量。结果表明,本方法的SD〈0.002,CV〈3.2,加标回收率在95.3%-108.0%。
Organic carbon from phosphate ore was oxidized by sulfuric acid - potassium dichromate standard solution on boiling water bath, and then titrated on the excessive sulfuric acid - potassium dichromate by ammonium ferrous sulphate standard solution. The content of organic carbon was calculated, and the SD and CV was lower than 0. 002 and 3.2% respectively with the recovery of 95.3 - 108.0%.
出处
《云南化工》
CAS
2008年第4期32-33,44,共3页
Yunnan Chemical Technology
关键词
磷矿石
沸水浴
硫酸-重铬酸钾
混合标准溶液
有机碳
phosphate ore
boiling water bath
sulfuric acid - potassium dichromate standard solution
organic carbon
作者简介
李张胜（1960-），男，河南林县人，工程师，主要从事质量检验技术管理工作。
