Alkali fusion/ICP-AES for the determination of boron in geological reference materials and a comparison with spectrophotometry.
Alkali fusion/ICP-AES for the determination of boron in geological reference materials and a comparison with spectrophotometry.
复制标题
碱熔/ICP-AES 测定地质标准物质中的硼并与分光光度法进行比较。
DOI：
10.2116/bunsekikagaku.47.451
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发表时间：
1998
期刊：
影响因子：
0.2
通讯作者：
M. Taniguchi
中科院分区：
文献类型：
--
作者：
S. Terashima;Takashi Okai;M. Taniguchi
用二氯乙烷萃取氟硼酸亚甲基蓝分光光度法测定地质样品中的硼，比电感耦合等离子体原子发射光谱法灵敏。但分光光度法中多种元素的干扰比ICP-AES法严重得多，分析过程也复杂得多。虽然H_2SO_4-HF混合酸溶样法可以安全地用于一般火成岩，但有些沉积物和沉积岩不能完全分解。将0.1 g样品与0.5 g碳酸钠熔融，并将熔融物溶解在6 M HCl中;然后，通过ICP-AES在249.678 nm发射线处直接测定硼。硼的测定下限为4 μg/g，精密度小于7%。该方法已成功应用于28种国际地质标准物质的分析。
For the determination of boron in geological materials, spectrophotometry with the extraction of methylene blue fluoroborate by dichloroethane is more sensitive than ICPAES. However, the interference of diverse elements in spectrophotometry is considerably more serious than that in ICP-AES, and the analytical procedures are much more complicated. Although the sample digestion-method with an acid mixture of H2SO4-HF can be safely adopted to common igneous rocks, some sediments and sedimentary rocks are not completely decomposed. A 0.1 g sample was fused with 0.5 g of sodium carbonate, and the melt was dissolved in 6 M HCl; then, boron was directly determined at the 249.678 nm emission line by ICP-AES. A determination limit of 4 μg/g of boron was achieved with a precision of less than 7%. The present method has been successfully applied to the analysis of 28 international geological reference materials.