This is the 12^th Atomic Spectrometry Update (ASU) to focus on advances in elemental speciation and covers a period of approximately 12 months from December 2018. This ASU review deals with all aspects of the analytical atomic spectrometry speciation methods developed for: the determination of oxidation states; organometallic compounds; coordination compounds; metal and heteroatom-containing biomolecules, including metalloproteins, proteins, peptides and amino acids; and the use of metal-tagging to facilitate detection via atomic spectrometry. As with all ASU reviews the focus of the research reviewed includes those methods that incorporate atomic spectrometry as the measurement technique. However, because speciation analysis is inherently focused on the relationship between the metal(loid) atom and the organic moiety it is bound to, or incorporated within, atomic spectrometry alone cannot be the sole analytical approach of interest. For this reason molecular detection techniques are also included where they have provided a complementary approach to speciation analysis. This year the number of publications concerning As speciation has fallen by about half, as have studies on Se speciation. Growth areas continue to be Hg and ‘biomolecules’, with the number of reports concerning halogen and sulfur speciation also rising. The number of elements covered this year is again over 20, showing the breadth of the elemental speciation field.

中文翻译：

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原子光谱法更新：审查元素形态学的进展

这是第12^次原子光谱更新（ASU），重点关注元素形态的进展，涵盖了自2018年12月起约12个月的时间。此ASU审查涉及为以下方面开发的分析原子光谱形态方法的所有方面：氧化态 有机金属化合物；配位化合物；含金属和杂原子的生物分子，包括金属蛋白，蛋白质，肽和氨基酸；以及使用金属标签以方便通过原子光谱法。与所有ASU审查一样，所研究的重点包括那些将原子光谱法作为测量技术的方法。但是，由于形态分析固有地专注于金属（胶体）原子与它所键合或并入其中的有机部分之间的关​​系，因此原子光谱法本身并不是唯一感兴趣的分析方法。因此，分子检测技术也包括在内，它们为物种分析提供了补充方法。今年，有关砷形态的出版物数量下降了约一半，有关硒形态的研究也下降了一半。生长区域仍然是汞和“生物分子”，有关卤素和硫形态的报告数量也在增加。