Combined Chemical Separation of Lu, Hf, Sm, Nd, and REEs from a Single Rock Digest: Precise and Accurate Isotope Determinations of Lu-Hf and Sm-Nd Using Multicollector-ICPMS

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• 作者：Ilka C. Kleinhanns ; Katharina Kreissig ; Balz S. Kamber ; Thomas Meisel ; Thomas F. Nä ; gler ; and Jan D. Kramers
• 刊名：Analytical Chemistry
• 出版年：2002
• 出版时间：January 1, 2002
• 年：2002
• 卷：74
• 期：1
• 页码：67 - 73
• 全文大小：70K
• 年卷期：v.74,no.1(January 1, 2002)
• ISSN：1520-6882

文摘

A combined procedure for separating Lu, Hf, Sm, Nd, andrare earth elements (REEs) from a single sample digestis presented. The procedure consists of the following fivesteps: (1) sample dissolution via sodium peroxide sintering; (2) separation of the high field strength elementsfrom the REEs and other matrix elements by a HF-freeanion-exchange column procedure; (3) purification of Hfon a cation-exchange resin; (4) separation of REEs fromother matrix elements by cation exchange; (5) Lu, Sm,and Nd separation from the other REEs by reversed-phaseion chromatography. Analytical reproducibilities ofSm-Nd and Lu-Hf isotope systematics are demonstratedfor standard solutions and international rock referencematerials. Results show overall good reproducibilities forSm-Nd systematics independent of the rock type analyzed. For the Lu-Hf systematics, the reproducibility ofthe parent/daughter ratio is much better for JB-1 (basalt)than for two analyzed felsic crustal rocks (DR-N and anArchaean granitoid). It is demonstrated that this poorerreproducibility of the Lu/Hf ratio is truly caused bysample heterogeneity; thus, results are geologically reasonable.