Acquisition of a Microwave Digestion System for Geochemical and Geochronological Applications

0549552 Widom该项目涉及购置一套微波消解系统和开发用于地球化学和地质年代学的微波样品制备技术。微波消解系统提供了一种安全、清洁和有效的机制，用于消解各种地质材料，以进行高精度微量元素丰度和同位素比测量，并允许通过显著更快的消解和干燥时间来增加样品通量。微波消解系统在进行锇-锇同位素和铂族元素研究时可替代Carius管消解仪，在进行微量元素、铀系不平衡和钐-钕年代学研究时可替代碲氧弹消解仪，用于溶解抗蚀相（如锆石、烧绿石、尖晶石、铬铁矿、萤石）。该设备被广泛用于各种正在进行的资助研究项目，涉及地质教师和研究生和本科生在迈阿密大学。此外，微波系统还用于实验室练习课程的教学，以培训学生掌握样品溶解技术和最先进的分析技术，包括电感耦合等离子体质谱和热电离质谱。

0549552WidomThis project involves the acquisition of a microwave digestion system and the development of microwave sample preparation techniques for geochemical and geochronological applications. The microwave digestion system provides a safe, clean and efficient mechanism for digestion of diverse geologic materials for high precision trace element abundance and isotope ratio measurements, and allows for increased sample throughput afforded by substantially faster digestion and dry-down times. The microwave digestion system is particularly important as an alternative to Carius tube digestions for rhenium-osmium isotope and platinum group element studies, and as an alternative to teflon bomb digestions for dissolution of resistant phases (e.g. zircon, pyrochlore, spinel, chromite, fluorite) for trace element, uranium series disequilibria and samarium-neodymium geochronology studies. This equipment is used extensively in diverse on-going funded research projects involving Geology faculty and graduate and undergraduate students at Miami University. In addition, the microwave system is used for teaching in courses with lab-based exercises to train students in sample dissolution techniques and state-of-the-art analytical techniques including inductively coupled plasma mass spectrometry and thermal ionization mass spectrometry.