• 责任者：Li Shizhen (Laboratory of Isotope Geology ; Ministry of Land and Resources ; Institute of Geology ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Zhu Xiangkun
• 刊名：Acta Geoscientica Sinica
• 出版年：2011
• 卷期：32(6)
• 关键词：植物地球化学测量 ; geochemical vegetable surveys ; 化学分析 ; chemical analysis
• 页码：p.754-760
• 图表：2 illus., 1 table, 25 refs.
• 分类号：0900
• 出版序号：20122371
• issnNo：ISSN1006-3021
• isbnNo：CN11-3474/P

Dry ashing and wet digestion are common methods for determining the content and isotopic composition of elements in organic samples. Wet digestion has been used mostly to dissolved samples for determining Cu, Zn and Fe isotopes. Relative to wet digestion, dry ashing is not only more efficient in sample preparation, but also uses less acid, thus suitable for bulk treatment. The results show that:1) for the elsholtzia splendens roots, the process of dry ashing does not cause isotope fractionation of Cu, Zn and Fe; 2) for Elsholtzia splendens stems, the process of dry ashing does cause isotope fractionation of Fe, but no fractionation of Cu and Zn isotopes occurs; and 3) for the Elsholtzia splendens leaves, the process of dry ashing does cause isotope fractionation of Cu and Fe, but no fractionation of Zn isotopes occurs.