色漆和清漆 “可溶性”金属含量的测定 第3部分:钡含量的测定 火焰原子发射光谱法

[中文适用范围]： 其原理是将测试溶液吸入一氧化二氮/乙炔火焰中。 测量钡在 553.5 nm 波长处发出的辐射。 通过添加氯化钾来抑制火焰中钡原子的电离。 该方法适用于“可溶性”钡含量在约0.05％(m/m)至5％(m/m)范围内的涂层材料。 此方法是发生争议时的裁判方法。 第二版取消并取代了 ISO 3856/3-1980，并对 ISO 3856/3-1980 进行了彻底修订。 [外文原描述]： The principle consists in the aspiration of the test solution into a dinitrogen monoxide/acetylene flame. Measurement of the radiation emitted by barium at a wavelength of 553,5 nm. The ionization of barium atoms in the flame is suppressed by addition of potassium chloride. The method is applicable to coating materials having "soluble" barium contents in the range of about 0,05 % (m/m) to 5 % (m/m). This method is the referee method in cases of dispute. This second edition cancels and replaces ISO 3856/3-1980, of which it constitutes a thorough revision.