在消除基体干扰的前提下，分别采用北二光Ｄ＿２／ＷＦＸ－ＩＥ－ＡＡＳ、日立Ｚ／１８０－８０－ＡＡＳ及Ｐ．Ｅ．Ｚ／３０３０－ＡＡＳ仪器，研究了不同测量日期中在同一台仪器上以最优化分析条件获得的海水基体中Ａｓ，Ｃｄ，Ｃｏ，Ｃｒ，Ｃｕ，Ｍｎ，Ｍｏ，Ｎｉ和Ｐｂ九个元素的ｍ＿（０Ｅ）值的稳定性；同时还考察了不同日期测得的玩具样品中Ａｓ元素的ｍ＿（０Ｅ）值的稳定性。研究结果表明对同一仪器元素的ｍ＿（０Ｅ）值不因实验者、样品基体和测量日期的不同而发生大的波动，具有一定的稳定性。 Under the premise of eliminating the matrix interference, the North II light D_2 / WFX-IE-AAS, Hitachi Z / 180-80-AAS and P were used respectively. E. Z / 3030-AAS instrument was used to study the effects of nine elements of As, Cd, Co, Cr, Cu, Mn, Mo, Ni and Pb on the same instrument in different seawater samples (0E). The stability of the m_ (0E) values ​​of As elements in the toy samples measured at different dates was also investigated. The results show that the m_ (0E) value of the same instrument element does not fluctuate greatly due to the difference of the experimenter, the sample matrix and the measured date, and has a certain stability.