标准摘要
[中文适用范围]： 本文件规定了使用硝酸（HNO3）、氢氟酸（HF）和盐酸（HCl）混合酸通过微波辅助溶解土壤样品测定总元素含量的方法。此方法适用于各种类型的土壤和土壤材料。主要应用领域为地质和 pedological 调查。该酸混合物适合于土壤中主要、次要和微量元素的完全溶解，但某些难熔化合物如 SiO2、TiO2、尖晶石、Al2O3 或其他化合物可能作为残留存在。在这种情况下，建议使用 ISO 14869-2 中的方法进行碱性融合以确定真实的总元素含量。注意：在环境研究中，通常使用 Aqua regia 提取方法，如 ISO 12914 或 ISO 11466。通过微波方法产生的溶液适用于分析，例如使用火焰原子吸收光谱法（FAAS、HGAAS、CVAAS、GFAAS）、电感耦合等离子体光学发射光谱法（ICP-OES）和电感耦合等离子体质谱法（ICP-MS）。注意：由于消化溶液中存在氯化物，某些分析技术的应用可能受到限制。 [外文原描述]： ISO 14869-3:2017 specifies a method for microwave-assisted dissolution of soil samples for determination of total element contents of Al, As, Ba, Ca, Cd, Co, Cr, Cs, Cu, Fe, Hg, K, Li, Mg, Mn, Na, Ni, P, Pb, S, Se, Sb, Sr, Tl, V, Zn using an acid mixture of nitric acid (HNO3), hydrofluoric acid (HF) and hydrochloric acid (HCl). This method is applicable to all types of soil and soil material. The main field of application is geological and pedological survey. The acid mixture is suitable for total dissolution of element contents in soil (major, minor and trace), but some refractory compounds such as SiO2, TiO2, spinel, Al2O3 or other compounds may remain as a residue. In such a case, the use of alkaline fusion, following ISO 14869‑2, is recommended to determine the true total element content. NOTE 1 In environmental studies, usually, aqua regia extraction is applied using ISO 12914 or ISO 11466. Solutions produced by the microwave method are suitable for analysis, for example, by using atomic absorption spectrometry (FAAS, HGAAS, CVAAS, GFAAS), inductively coupled plasma optical emission spectrometry (ICP-OES) and inductively coupled plasma mass spectrometry (ICP-MS). NOTE 2 Due to the presence of chloride in the digestion solution, limitations for the application of some analytical techniques can occur.
英文名称Soil quality — Dissolution for the determination of total element content — Part 3: Dissolution with hydrofluoric, hydrochloric and nitric acids using pressurised microwave technique