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文中提出不同作用机理的双基体改进剂用于电热原子吸收法,建立直接测定海水中铝的方法.EDTA铵盐、氯化镁双基体改进剂有效地排除海水基体和微量元素干扰,测定铝的灵敏提高五倍以上。用标准曲线法计算铝含量,回收率为93.7—104.3％,相对标准偏差为2.6％,检出限为0.9μg/1.可分别测定铝总量,颗粒志铝及总溶解志铝.
In this paper, a dual-matrix modifier with different mechanism of action is proposed for the determination of aluminum in seawater by electrothermal atomic absorption spectrometry.The ammonium EDTA and magnesium chloride dual-matrix improvers effectively eliminate the interference of seawater matrix and trace elements, and measure the sensitive increase of aluminum More than five times. The aluminum content was calculated by the standard curve method with the recovery of 93.7-104.3%, the relative standard deviation of 2.6%, and the detection limit of 0.9μg / 1. The total aluminum, particulate aluminum and total dissolved aluminum can be determined separately.