火焰原子吸收光谱法测定高纯碳酸钡中锶  

FAAS Determination of Strontium in High-purity Barium Carbonate

作　　者：栾雪梅 王璟 商少明 

机构地区：[1]江南大学化学与材料工程学院,无锡214122

出　　处：《理化检验（化学分册）》2009年第9期1056-1057,共2页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：在火焰原子吸收光谱法测定高纯碳酸钡中痕量锶的方法中,试验了在样品溶液中分别加入不同比例的6种有机试剂以提高方法的灵敏度。结果表明:在试样溶液中加入甲酸达到体积分数为85%时,其增感度提高达70%,为与其他5种试剂(甲醇、乙醇、正丙醇、甲醛及乙酸)相比较而言的最高值。对甲酸-水(85+15)溶液体系中,火焰原子吸收光谱法测定锶标准加入法测得的回收率在100%～106%之间,测定值的相对标准偏差(n=6)为2.2%。In the FAAS determination of strontium in high-purity barium carbonate, sensitization effects of 6 organic reagent were tested when added to the aqueous sample solution with different mixing ratios. It was found that formic acid, when added to a volumic ratio of 85%, showed highest sensitizing effect （ca. 70%） as compared with the other 5 reagents （i. e. , methanol, ethanol, n-propanol, formaldehyde and acetic acid）. Recovery and precision of the method using the formic acid-H2O （85＋15） solution system, were tested by addition of standard Sr solution （i. e. , 1.9 mg·g^-1） for 6 determinations, giving values of recovery ranged from 100% to 106% and value of RSD （n=6） obtained was 2. 2%.

关 键 词：火焰原子吸收光谱法 有机试剂 增感作用 锶 碳酸钡 

分 类 号：O657.31[理学—分析化学]