The characterisation of relative copper isotope amount ratios (δ⁶⁵Cu) helps constrain a variety of geochemical processes occurring in the geosphere, biosphere and hydrosphere. The accurate and precise determination of δ⁶⁵Cu in matrix reference materials is crucial in the effort to validate measurement methods. With the goal of expanding the number and variety of available geological and biological materials, we have characterised the δ⁶⁵Cu values of ten reference materials by MC‐ICP‐MS using C‐SSBIN model for mass bias correction. SGR‐1b (Green River shale), DOLT‐5 (dogfish liver), DORM‐4 (fish protein), TORT‐3 (lobster hepatopancreas), MESS‐4 (marine sediment) and PACS‐3 (marine sediment) have for the first time been characterised for δ⁶⁵Cu. Additionally, four reference materials (with published δ⁶⁵Cu values) have been characterised: BHVO‐1 (Hawaiian basalt), BIR‐1 (Icelandic basalt), W‐2a (diabase) and Seronorm™ Trace Elements Serum L‐1 (human serum). The reference materials measured in this study possess complex and varied matrices with copper mass fractions ranging from 1.2 µg g⁻¹ to 497 µg g⁻¹ and δ⁶⁵Cu values ranging from −0.20‰ to 0.52‰ with a mean expanded uncertainty of ± 0.07‰ (U, k = 2), covering much of the natural copper isotope variability observed in the environment.

中文翻译：

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通过MC-ICP-MS分析地质和生物参考物质中的铜同位素

相对铜同位素量比的表征（δ ⁶⁵ Cu）的帮助约束各种地圈，生物圈和水圈发生的地球化学过程的。δ的准确和精确的确定⁶⁵的Cu基质中的参考材料是在努力以验证测量方法是至关重要的。与扩展可用地质和生物材料的数量和种类的目标，我们有特点的δ ⁶⁵通过使用C-SSBIN模型质量偏差校正MC-ICP-MS的10参考材料的Cu值。SGR-1b（绿河页岩），DOLT-5（dog鱼肝），DORM-4（鱼蛋白），TORT-3（龙虾肝胰腺），MESS-4（海洋沉积物）和PACS-3（海洋沉积物）具有在第一时间被表征为δ ⁶⁵铜 此外，四个参考材料（与公开的δ ^65个的Cu值）已被表征：BHVO-1（夏威夷玄武岩），BIR-1（冰岛玄武岩），W-2A（辉绿岩）和Seronorm™微量元素血清L-1（人血清）。在这项研究中所测量的参考材料具有与铜的质量分数范围从1.2复杂多样的基质微克克^-1至497微克克^-1和δ ^65个的Cu值范围从-0.20‰至0.52‰具有±0.07的平均扩展不确定度‰（U，k  = 2），涵盖了在环境中观察到的大部分天然铜同位素变异性。