火焰原子吸收法间接测定钢中硼和磷  

Indirect Determination of Trace Boron and Phosphorus in Steel by Flame Atom Absorption Spectrometry

作　　者：陆建平[1] 彭剑[1] 王益林[1] 石建荣 曹家兴[1] 

机构地区：[1]广西大学化学化工学院,南宁530004 [2]广西华锑化工有限公司,南宁

出　　处：《应用化学》2008年第6期710-713,共4页Chinese Journal of Applied Chemistry

基　　金：广西大学科研基金资助项目(X051108)

摘　　要：提出了溶剂萃取，火焰原子吸收光谱法间接测定钢中硼和磷的分析方法。在弱酸性介质中硼酸、苯羟乙酸、铁（Ⅱ）以及邻二氮菲能形成稳定的多元离子缔合物，被1，2-二氯乙烷萃取后再用去离子水反萃取，然后测定水相化合物中的铁；在盐酸介质中，磷酸根与钼酸铵形成磷钼杂多酸，被甲基异丁基甲酮萃取后，测定有机相磷铝杂多酸中的铝。并可分别间接测定硼和磷。在优化的反应条件下，硼和磷的质量浓度分别在0．12～3．24及0．04～1．00mg／L范围内时．吸光度与质量浓度之间具有良好的线性关系，硼和磷的检出限分别为0．036和0．015mg／L。以8份样品空白进行测定，得硼和磷的标准偏差分别为1．2％和0．5％。方法用于钢样中微量硼和磷的测定．拓展了原子吸收分光光度计的应用范围。The indirect determination of boron and phosphorus in steel was invesgitated by flame atom absorption spectrometry（FAAS） method with extraction. 1,2-Dichloroethane was used to extract the associate consisting of borax, phenylhydroxyacetic acid and [ Fe （phen） 3 ]^2 ＋ in a weak acid, then Fe of the associate was stripped with water. Methyl isobutyl ketone was used for extracting phosphomolybdate complex acid. The content of boron and phosphorus was investigated in steel samples by determining the amount of iron in the water phase and molybdenum in organic phase by flame atom absorption spectrometry. The dynamic calibration curves of boron and phosphorus were obtained within 0. 04 - 1.00 mg/L and 0. 12 -3.24 mg/L respectively. The limits of detections are 0. 036 mg/L for boron and 0. 015 mg/L for phosphorus. This method has the advantages of simple operation, good selectivity and low detection limit, showing a good potential to determine trace boron in steel.

关 键 词：火焰原子吸收法 钢 硼 磷 

分 类 号：O657.3[理学—分析化学]