A worldwide scientometric analysis of Isotope Dilution ICP-MS over four decades: a critical perspective

Isotope dilution with inductively coupled plasma mass spectrometry (ID ICP-MS) has been recognized as one of the most precise and accurate techniques for trace and ultra-trace elemental analysis, with applications spanning geochemistry, environmental monitoring, nuclear forensics, and toxicology. Despite its analytical robustness, the global distribution of ID ICP-MS research remains concentrated in economically developed regions. This study presents a scientometric assessment of worldwide publications on ID ICP-MS from 1980 to 2025, based on bibliographic data retrieved from Scopus and Web of Science. The results reveal that geochemically relevant elements-often used in geochronology-have historically driven the development and application of the technique, followed by toxic elements such as mercury (Hg), cadmium (Cd), and lead (Pb). Results also show that China and the USA lead in total publications, while European countries demonstrate strong internal collaboration networks. In contrast, Latin American and African countries exhibit a markedly lower number of contributions, suggesting significant limitations in access to instrumentation, isotopically enriched standards, and research infrastructure. These findings emphasize the need for initiatives that promote global access to ID ICP-MS, which could play a crucial role in enhancing analytical capacity and advancing scientific equity worldwide.