锡石墨炉原子化机理研究  

Study on the Atomization Mechanism of Tin in the Graphite Furnace

作　　者：何金兰[1] 莫少波[1] 姚松年[1] 杨业智[1] 雍援 李洪仪[1] 

机构地区：[1]武汉大学测试中心

出　　处：《分析测试通报》1991年第3期21-26,共6页

摘　　要：本文考察了盐酸、硫酸、硝酸、亚硒酸及硼酸中锡的石墨炉原子吸收特性,对锡在不同基体中的原子化过程进行了初步探讨。发现硼酸是石墨炉法测定锡时的一种较好的化学改进剂;1%的硼酸加入可克服一定含量的硫酸与盐酸的干扰。并利用XRD与XPS对硼酸与锡共存时的石墨表面进行了结构与状态分析。提出了硼酸与锡共存时,锡的原子化历程。The absoaption character of Tin in the graphite furnace with HCL, HNO_3,H_2SO_4, H_2SeO_3and H_3BO_3 was investigated. The mechanism of free atom formation of Tin in the different ma-trixes of graphite furnace was studied. It was found that the H_3BO_3 was a better matrix modi-fier for Tin in the graphite furnace. The addition of 1% H_3BO_3 can overcome some effects fromsulfuric acid hydrochloric acid. Under different temperature, the surfaces of the graphite furnace with H_3BO_3 and Sn wereanalyzed by X-ray power diffractometer and X-ray photoelectron spectrometer. The resultssuggest atomization process of Tin was changed because of the present of H_3BO_3.

关 键 词：石墨炉 原子化 原子吸收 锡 

分 类 号：O614.432[理学—无机化学]