佛尔哈德法测定复杂物料中氯
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摘要
含氯复杂物料用20%氢氧化钠溶液进行消解后,在酸性环境中,加过量硝酸银沉淀氯离子,后以铁铵钒作指示剂,用硫氰酸铵标准溶液滴定过剩的银离子,从而推算出复杂物料中的氯含量,试验证明该法精密度和准确度都很高,能很好地运用于生产。
The complex materials containing chlorine are digested with 20% sodium hydroxide solution. After it,in the acidic environment,excess silver nitrate precipitates chloride ions,and then vanadium iron ammonium is used as an indicator,and excess silver ions are titrated with ammonium thiocyanate standard solution. To calculate the chlorine content in complex materials,experiments show that the precision and accuracy of this method are very high and can be used well in production.
The complex materials containing chlorine are digested with 20% sodium hydroxide solution. After it,in the acidic environment,excess silver nitrate precipitates chloride ions,and then vanadium iron ammonium is used as an indicator,and excess silver ions are titrated with ammonium thiocyanate standard solution. To calculate the chlorine content in complex materials,experiments show that the precision and accuracy of this method are very high and can be used well in production.
引文
[1]王玉枝.化学分析[M].北京:中国纺织出版社,2008.
[2]邹学贤.分析化学[M].北京:人民卫生出版社,2006.
[3]安泰莹,文庆珍,朱金华.氯离子测定方法研究进展[J].河南化工,2013,30(Z2):8-11,24.
[4]刘顺珍,张丽霞.可溶性氯化物中氯含量测定的3种试验教学方法比较[J].广西科学院学报,2012,28(2):152-155.
[5]孙万虹,张麟文,李培显,等.可溶性氯化物中氯含量测定试验的改进[J].西北民族大学学报(自然科学版),2011,32(3):5-7,29.
[2]邹学贤.分析化学[M].北京:人民卫生出版社,2006.
[3]安泰莹,文庆珍,朱金华.氯离子测定方法研究进展[J].河南化工,2013,30(Z2):8-11,24.
[4]刘顺珍,张丽霞.可溶性氯化物中氯含量测定的3种试验教学方法比较[J].广西科学院学报,2012,28(2):152-155.
[5]孙万虹,张麟文,李培显,等.可溶性氯化物中氯含量测定试验的改进[J].西北民族大学学报(自然科学版),2011,32(3):5-7,29.