ISO 6503:1984 色漆和清漆.铅总含量的测定.火焰原子吸收光谱测定法

标准编号：ISO 6503:1984

中文名称：色漆和清漆.铅总含量的测定.火焰原子吸收光谱测定法

英文名称：Paints and varnishes — Determination of total lead — Flame atomic absorption spectrometric method

发布日期：1984-10

标准范围

该方法适用于铅含量在0.01%（m/m）至2%（m/m）范围内的涂层材料，也可适用于总铅含量超过2%（m/m）的产品，前提是精度要求不超过规定值。给出了两种方法。干灰化法的原理包括将试样蒸发至干燥状态，在475℃下灰化，并用盐酸萃取残渣中的任何铅；湿式氧化法包括用硫酸和过氧化氢或硫酸和硝酸的混合物对试样进行湿式氧化，并用EDTA和氨溶液萃取残渣中的任何铅。

The method is principle to coating materials having lead contents in the range of about 0,01 % (m/m) to 2 % (m/m), may also be applicable to products with a total lead content of more than 2 % (m/m) when the requirements of precision does not exceed the specified values. two methods are given. The principle of the dry ashing method consists in evaporation of a test portion to dryness and ashing at 475 C and extraction of any lead in the residue with hydrochloric acid; that of the wet oxidation method consists in wet oxidation of a test portion with a mixture of sulfuric acid and hydrogen peroxide or with sulfuric acid and nitric acid and extraction of any lead in the residue with EDTA and ammonia solution.

标准预览图