石墨炉原子吸收光谱法测定生活饮用水中微量钡的研究  

Determination of barium in drinking water by graphite furnace atomic absorption spectrometry

作　　者：宋秀玲[1] 钱会[1] 肖明发[2] 

机构地区：[1]长安大学环境科学与工程学院,陕西西安710054 [2]福州市疾病预防控制中心,福建福州350004

出　　处：《应用化工》2012年第12期2171-2173,共3页Applied Chemical Industry

摘　　要：研究了石墨炉原子吸收光谱法测定生活饮用水中微量钡的方法,确定了石墨管类型、最佳加热程序和最佳基体改进剂的测定条件。结果表明,选用热解涂层平台石墨管、硝酸镁为基体改进剂,灰化温度1 200℃,原子化温度2 500℃,其加标回收率为96.3%～103.6%,RSD<4.8%,基体改进剂的使用有效地降低了背景吸收,提高了背信比。该方法简便、快速,适用于生活饮用水中钡的测定。Determination of barium in drinking water by graphite furnace atomic absorption spectrometry was studied. The best measurement conditions of the graphite tube type, heating program and matrix modi- fier were confirmed. The results showed that with pyrolytic coating platform graphite tube, with magnesium nitrate used as matrix modifier, with the incineration temperature of 1 200 ℃ and the atomized tempera- ture of 2 500 ℃ ,the method recoveries were in the ranges of 96.3% ～ 103.6% and RSD 〈4.8%. The low background adsorption and the higher signal to background ratio can be gained when the matrix modi- fier was used. This method is convenient, quick and has been used to determine barium in drinking water.

关 键 词：钡 石墨炉原子吸收光谱法 基体改进剂 

分 类 号：X832[环境科学与工程—环境工程] O657.31[理学—分析化学]