标准摘要
[中文适用范围]： 该方法的原理在于用合适的溶剂稀释样品，通过离心分离颜料。 描述了三种方法，具体取决于所检查产品的粘合剂。 用盐酸以质量：体积比1：15提取分离出的色素，但“可溶性”铅的测定除外；在这种情况下，以1:1000的比例进行提取。 将离心所得液体部分蒸发至干，干灰化分析并用硝酸提取灰分。 对于粉末形式的涂料，无需事先分离粘合剂即可进行提取。 [外文原描述]： The principle of the method consists in the dilution of a sample with a suitable solvent, separation of the pigment by centrifugation. Three methods, dependent on the binder of the product being examined, are described. Extraction of the separated pigment with hydrochloric acid at a ratio of mass:volume of 1:15, except for the determination of "soluble" lead; in that case, extraction is carried out at a ratio of 1:1000. Evaporation to dryness of the liquid portion obtained by centrifuging, analysis by dry ashing and extraction of the ash with nitric acid. For coating materials in powder form, extraction is carried out without prior separation of the binder.
英文名称Paints and varnishes — Preparation of acid extracts from paints in liquid or powder form