ISO 14869-2:20 02规定了土壤中下列元素总含量的溶解方法: 钠、钾、镁、钙、钛、锰、铁、铝、硅 该列表并非详尽无遗，其他要素也适用于提供的测定: 它们在融合过程中不会丢失，w>（3d·V/m）。 哪里 w为元素的质量含量，以毫克/千克土壤表示， d是所考虑的元素和分析方法的检测限，单位为毫克/升， 3是常规因子， V是含有溶解样品的最终溶液的调节体积，单位为升，并且 m是测试部分的质量，单位为千克， 测定不会受到所得溶液中高盐浓度的不利影响。 该方法提出的通量适用于广泛的材料，其中土壤样品相对容易处理。

ISO 14869-2:2002 specifies a method for the dissolution of total contents for the following elements in soils: Na, K, Mg, Ca, Ti, Mn, Fe, Al, Si This list is not exhaustive, and other elements are applicable for determination provided:

• they are not lost during the fusion process,
• w > (3d · V/m).

where w is the mass content of the element, expressed in milligrams per kilogram soil, d is the detection limit, in milligrams per litre, for the element and analytical method considered, 3 is a conventional factor, V is the adjusted volume, in litres, of the final solution containing the dissolved sample, and m is the mass of the test portion, in kilograms,

• the determination is not adversely affected by the high salt concentration in the resultant solution.

The flux proposed in this method is suitable for a wide range of materials, among which soil samples are relatively easy to deal with.