标准摘要
[中文适用范围]： 分子吸收光谱法(A)适用于硅含量0.05～0.5%(m/m)的产品，重量法(B)适用于硅含量0.5～15%的产品（毫米）。 ISO 5997 应与 ISO 4297 一起阅读。 其中规定了原理、试剂、仪器、程序、光谱测量（仅限方法 A）和结果表达。 [外文原描述]： The molecular absorption spectrometric method (A) is applicable to products having silicon contents from 0,05 to 0,5 % (m/m), the gravimetric method (B) is applicable to products having silicon contents from 0,5 to 15 % (m/m). ISO 5997 should be read in conjunction with ISO 4297. Specifies among other things principle, reagents, apparatus, procedure, spectrometric measurement (method A only) and expression of results.
英文名称Chromium ores and concentrates — Determination of silicon content — Molecular absorption spectrometric method and gravimetric method