In many cases involving the management of technological materials, such as electronic waste, characterization is performed to determine the precise elemental composition, as well as to detect harmful elements and substances. However, this is hampered by the lack of suitable reference materials for electronic waste. In the present study, a newly developed reference material for electronic waste according to the requirements imposed by ISO Guides 30–35 is discussed. Homogeneity, stability and characterization studies were performed using microwave-assisted acid leaching (aqua regia 50% v/v) and inductively coupled plasma optical emission spectrometry (ICP OES) for determination of Ag, Al, As, Au, Ba, Cr, Cu, Fe, Ni, Pb, Sb, Si, Sn, and Zn. One-way analysis of variance (ANOVA) at the 95% confidence level and linear regression were used as statistical parameters to obtain the uncertainty contributions to characterization (u_char), between-bottle homogeneity (u_bb), and short-term (u_sts) and long-term (u_lts) stability tests. The results from the collaborative trial allowed the estimated mass fraction and associated uncertainty (U_RM) to be obtained for each element monitored.

中文翻译：

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建议将电子废物作为参考材料–第2部分：均匀性，稳定性，特征和不确定性†

在许多涉及技术材料（例如电子废物）管理的情况下，进行表征以确定确切的元素组成，并检测有害的元素和物质。但是，由于缺乏适用于电子废物的参考材料而受到阻碍。在本研究中，根据ISO指南30-35的要求，对新开发的电子废物参考材料进行了讨论。使用微波辅助酸浸法（王水50％v / v）和电感耦合等离子体发射光谱法（ICP OES）进行同质性，稳定性和表征研究，用于测定Ag，Al，As，Au，Ba，Cr，Cu ，Fe，Ni，Pb，Sb，Si，Sn和Zn。u _char），瓶间均质性（u _bb）以及短期（u _sts）和长期（u _lts）稳定性测试。协作试验的结果允许获得所监测的每个元素的估计质量分数和相关的不确定性（U _RM）。