化探样品中微量硼的乙基罗丹明B比色测定  

ETHYL RHODAMINE B COLORIMETRIC METHOD FOR DETERMINATION OF TRACE AMOUNT OF BORON IN CHEMICAL EXPLORATION SAMPLES

作　　者：邓维群 游宗保 Deng Weiqun;Yo ZunPao

机构地区：[1]福建省地质中心实验室

出　　处：《岩矿测试》1983年第2期140-141,I0007,共3页Rock and Mineral Analysis

摘　　要：本文在我们过去工作的基础上对氟硼酸—乙基罗丹明B比色测定硼的方法进一步予以改进,并在试样碱熔水提液中直接以硫酸调节酸度至pH≈5以沉淀分离大量硅酸,铌、钽和其它金属氢氧化物,效果良好,能满足化探工作需要。 试验部分 一、试剂 硼标准溶液 硼酸0.572克溶于水中并稀释至1000毫升,摇匀。此溶液1毫升含100微克硼。再稀释配制1毫升含2微克硼的标准溶液。A new colorimetric method for the determination of trace amount of boron with ethyl Rhodamine B as a chromogenic agent is studied. The elimination of the interference of tantalum and diverse ions are described. Beer’s law holds for the range of 0-6ug B/10 ml. The recoveries obtained by the addition of known amount of boron are nearly 100%.

关 键 词：金属氢氧化物 乙基罗丹明B 比色测定 标准溶液 化探样品 沉淀分离 氟硼酸 微量硼 

分 类 号：O65[理学—分析化学]