标准摘要
[中文适用范围]： AAS 方法的原理是将测试溶液吸入乙炔/空气火焰中。 测量镉空心阴极或镉放电灯发出的选定光谱线在 228.8 nm 区域的吸收率。 极谱法的原理在于在极谱池中电解测试溶液，测量相应的电位阶跃高度。 该方法适用于“可溶性”镉含量在约0.05％(m/m)至5％(m/m)范围内的涂料。 如有争议，应采用AAS法作为裁判方法。 第二版取消并取代了 ISO 3856/4-1980。 [外文原描述]： The principle of the AAS method consists in inspiration of the test solution into an acetylen/air flame. Measurement of the absorption of the selected spectral line emitted by a cadmium hollow-cathode or cadmium discharge lamp, in the region of 228,8 nm. The principle of the polarographic method consists in electrolysis of the test solution in a polarographic cell measurement of the corresponding heigth of the potential step. The method are applicable to coating materials having "soluble" cadmium contents in the range of about 0,05 % (m/m) to 5 % (m/m). The AAS method should be used as the referee method in cases of dispute. This second edition cancels and replaces ISO 3856/4-1980.
英文名称Paints and varnishes — Determination of "soluble" metal content — Part 4: Determination of cadmium content — Flame atomic absorption spectrometric method and polarographic method