Silicon (Si) is the second most abundant element in the continental crust. Studies have illustrated that silicon isotopes have a potential to be tracers in the biogeochemical silica cycle. This paper details a developed method for the production and certification of a new Si reference material with natural-like isotopic composition using a fully calibrated multi-collector inductively coupled plasma-mass spectrometer (MC-ICP-MS). To correct for the mass bias effect, three blend solutions were gravimetrically prepared with isotopically enriched ²⁸Si, ²⁹Si and ³⁰Si materials. Homogeneity and stability tests were performed, and no significant influences were found. Uncertainties of property values were evaluated, and the traceability to the International System of Units (SI) was established. The developed certified reference material (GBW04503) is a silicon powder (≈ 300 mesh) with high purity (≈ 0.999 99 kg kg⁻¹), which can be used in silicon isotopic measurement to support validation of analytical procedures and/or quality control of gas source mass spectrometry (GS-MS) or MC-ICP-MS. The certified isotope amount ratios of n(²⁹Si)/n(²⁸Si) and n(³⁰Si)/n(²⁸Si) are 0.050291(12) mol mol⁻¹ and 0.033397(16) mol mol⁻¹, respectively, (k = 2), and the certified isotope amount fractions of silicon are 92.2776(20)% (²⁸Si), 4.6407(10) % (²⁹Si) and 3.0818(14)% (³⁰Si) (k = 2). Meanwhile, the delta value of δ^30/28Si_{NBS 28} = 1.679(17)‰ was obtained (k = 2).

中文翻译：

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具有 SI 可追踪同位素组成的天然硅参考材料的认证

硅（Si）是大陆地壳中第二丰富的元素。研究表明，硅同位素有可能成为生物地球化学二氧化硅循环中的示踪剂。本文详细介绍了一种使用完全校准的多收集器电感耦合等离子体质谱仪 (MC-ICP-MS) 生产和认证具有类似天然同位素组成的新型 Si 参考材料的开发方法。^{为了校正质量偏差效应，使用同位素富集的28} Si、²⁹ Si 和³⁰重量法制备三种混合溶液硅材料。进行了均匀性和稳定性测试，未发现显着影响。评估了属性值的不确定性，并建立了对国际单位制 (SI) 的可追溯性。开发的认证标准物质 (GBW04503) 是一种高纯度 (≈ 0.999 99 kg kg ^-1 ) 的硅粉末 (≈ 300 目)，可用于硅同位素测量，以支持分析程序的验证和/或质量控制气源质谱 (GS-MS) 或 MC-ICP-MS。n ( ²⁹ Si)/ n ( ²⁸ Si) 和n ( ³⁰ Si)/ n ( ²⁸ )的核定同位素量比Si) 分别为 0.050291(12) mol mol ^-1和 0.033397(16) mol mol ^-1 , ( k  = 2), 硅的核证同位素量分数为 92.2776(20)% ( ²⁸ Si), 4.6407( 10) % ( ²⁹ Si) 和 3.0818(14)% ( ³⁰ Si) ( k  = 2)。同时得到δ ^30/28 Si _{NBS 28}  = 1.679(17)‰ ( k  = 2)。