混合胶束协同增效光度法测定陶瓷原料中铁
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摘要
研究了聚乙烯醇(PVA)、溴化十六烷基三甲基铵(CTMAB)和Triton X-100组成的混合胶束对硫氰酸盐和结晶紫与铁(Ⅲ)显色反应的增敏、增稳作用,建立了光度法测定陶瓷原料中铁(Ⅲ)的新方法。结果表明:在0.5 mol/L H_2SO_4介质中,在混合表面活性剂的作用下,铁(Ⅲ)与结晶紫和硫氰酸盐形成红色的缔合物,λmax=482 nm,表观摩尔吸光系数为4.1×10~4L·mol~(-1)·cm~(-1)。铁的质量浓度在0~2μg/m L范围内与吸光度呈良好的线性关系。显色反应有良好的选择性,主要共存离子均有较大的允许量,方法应用于陶瓷原料中铁的测定,相对标准偏差分别为1.6%和2.3%,加标平均回收率为103%~105%。
The sensitizing and stabilizing effect of mixed surfactants PVA、CTMAB and Triton X-100 on color reaction of thiocyanate and crystal violet with iron(Ⅲ)was studied.A new method to determine iron in ceramic materials by spectrophotometry was established.The results showed that iron(Ⅲ)reacted with thiocyanate and crystal violet to form a red complex in the medium of 0.5mol/L H_2SO_4and in the presence of mixed surfactant.The maximum absorption wavelength was 482nm.The apparent molar absorptivity was 4.1×10~4L·mol~(-1)·cm~(-1).The absorbance showed good linearity with Fe3+in the range of 0~2μg/m L.Main coexisting ions had larger allowances.The method has been applied to the direct determination of iron in ceramic materials with the relative standard deviation of 1.6%and 2.3%,and the recovery of 103%~105%.
The sensitizing and stabilizing effect of mixed surfactants PVA、CTMAB and Triton X-100 on color reaction of thiocyanate and crystal violet with iron(Ⅲ)was studied.A new method to determine iron in ceramic materials by spectrophotometry was established.The results showed that iron(Ⅲ)reacted with thiocyanate and crystal violet to form a red complex in the medium of 0.5mol/L H_2SO_4and in the presence of mixed surfactant.The maximum absorption wavelength was 482nm.The apparent molar absorptivity was 4.1×10~4L·mol~(-1)·cm~(-1).The absorbance showed good linearity with Fe3+in the range of 0~2μg/m L.Main coexisting ions had larger allowances.The method has been applied to the direct determination of iron in ceramic materials with the relative standard deviation of 1.6%and 2.3%,and the recovery of 103%~105%.
引文
[1]GB/T 4734-1996,陶瓷材料及制品化学分析方法[S].
[2]黄雨,叶琼,孔德圣.火焰原子吸收光谱法测定碳酸钙中铁含量[J].轻工科技,2017,(5):101.
[3]向清德,邹华盈,郭晓明,等.X射线荧光法测定高岭土中各元素的含量[J].陶瓷科学与艺术,2006,(12):204-207.
[4]王传胜,王美兰,李建彬.甘肃某地区陶瓷原料的成分分析与评价[J].陶瓷,2016,(11):32-36.
[5]GB/T 14563-2008,高岭土及其试验方法[S].
[6]蔡新安,章慧芳,李硕,等.磺基水杨酸分光光度法测定陶瓷原料中的微量铁[J].中国陶瓷,2008,(11):63-65.
[7]杨勇,罗川南,张瑾,等.陶瓷原料中微量铁的快速测定[J].中国陶瓷,2000,(2):45-46.
[8]傅翠梨,陈文瑞,郭阿明,等.邻菲啰啉光度法测定高岭土中可溶铁和非可溶铁[J].岩矿测试,2012,(4):621-626.
[9]刘忠芳,刘绍璞,谢慈仪.硫氰酸盐和结晶紫分光光度法测定痕量铁[J].西南师范大学学报,1989,(4):105-109.
[10]冯少良.混合表面活性剂对多芳烃的增溶作用机理及影响因素[D].杭州:浙江大学,2003.
[11]汤家华,李明玲.2-羟基-3-甲氧基苯基荧光酮分光光度法测定陶瓷原料中钛[J].中国陶瓷,2009,(11):54-55.
[2]黄雨,叶琼,孔德圣.火焰原子吸收光谱法测定碳酸钙中铁含量[J].轻工科技,2017,(5):101.
[3]向清德,邹华盈,郭晓明,等.X射线荧光法测定高岭土中各元素的含量[J].陶瓷科学与艺术,2006,(12):204-207.
[4]王传胜,王美兰,李建彬.甘肃某地区陶瓷原料的成分分析与评价[J].陶瓷,2016,(11):32-36.
[5]GB/T 14563-2008,高岭土及其试验方法[S].
[6]蔡新安,章慧芳,李硕,等.磺基水杨酸分光光度法测定陶瓷原料中的微量铁[J].中国陶瓷,2008,(11):63-65.
[7]杨勇,罗川南,张瑾,等.陶瓷原料中微量铁的快速测定[J].中国陶瓷,2000,(2):45-46.
[8]傅翠梨,陈文瑞,郭阿明,等.邻菲啰啉光度法测定高岭土中可溶铁和非可溶铁[J].岩矿测试,2012,(4):621-626.
[9]刘忠芳,刘绍璞,谢慈仪.硫氰酸盐和结晶紫分光光度法测定痕量铁[J].西南师范大学学报,1989,(4):105-109.
[10]冯少良.混合表面活性剂对多芳烃的增溶作用机理及影响因素[D].杭州:浙江大学,2003.
[11]汤家华,李明玲.2-羟基-3-甲氧基苯基荧光酮分光光度法测定陶瓷原料中钛[J].中国陶瓷,2009,(11):54-55.