原子吸收光谱法测定浓海水中的微量锂  

Determination of Rrace Lithium(1+) in Concentrated Brine by Atomic Absorption Spectrometry

作　　者：杨淑清[1] 竺柏康[1] 王路辉[1] 

机构地区：[1]浙江海洋学院石油化工学院,浙江舟山316000

出　　处：《浙江海洋学院学报（自然科学版）》2012年第2期153-156,共4页Journal of Zhejiang Ocean University(Natural Science Edition)

基　　金：国家科技支撑计划项目(2009BAB47B08);浙江省重大科技专项(2008CO3006)

摘　　要：采用空气-乙炔火焰原子吸收光谱法测定浓海水中微量金属锂离子时,干扰主要来自浓海水中共存的高浓度的阳离子。探讨了共存的主要阳离子对锂离子测定的影响,并分析了消除高浓度阳离子干扰的方法。结果表明:Ca2+和Mg2+是主要干扰元素,可以采用标准加入法消除共存的高浓度阳离子的干扰;锂在0.13～1.92 mg/L范围内线性关系良好,平均回收率为99.62%。The trace Li^＋ in concentrated brine was determined by air-acetylene flame atomic absorption spectrometry at the wave length of 670.8 nm. The disturbance from coexisting cations on the lithium （1＋） was investigated. The disturbance was from high concentration ions of Ca^2＋ and Mg^2＋. The ions of Na^＋ and K^＋ had little affection. The standard addition method is an effective way to eliminate the disturbance of main cations. The experimental results indicated that the linear range for lithium was 0.13-1.92 mg/L and average recovery was 99.62%.

关 键 词：原子吸收光谱法 锂含量 浓海水 标准加入法 

分 类 号：O657.31[理学—分析化学]