皮革.化学试验.水溶物、水溶无机物和水溶有机物的测定

[中文适用范围]： 本标准规定了水溶性物质、水溶性无机物和水溶性有机物的测定方法。 它适用于所有皮革类型。 该分析获得的结果取决于以下因素： ——皮革研磨的程度； ——萃取温度； ——萃取期； ——皮革与水的比例。 为了获得可比较的结果，必须准确地再现测试条件。 在所有情况下，滤液中的任何铵盐都作为水溶性物质的一部分包含在内，然后在灼烧时分解。 因此，它们有助于水溶性有机物质的结果。 如果需要，可以单独测定滤液中铵盐的浓度。 [外文原描述]： ISO 4098 | IULTCS/IUC 6:2018 specifies a method of determination of water-soluble matter, water-soluble inorganic matter and water-soluble organic matter. ISO 4098 | IULTCS/IUC 6:2018 is applicable to all leather types. The result obtained by this analysis depends on factors such as: - the degree to which the leather is ground; - the extraction temperature; - the extraction period; - the ratio of leather to water. To obtain comparable results, it is consequently imperative that test conditions be accurately reproduced. In all cases, any ammonium salts in the filtrate are included as part of the water-soluble matter and are then decomposed on ignition. Thus they contribute towards the result for water-soluble organic substances. The concentration of the ammonium salts can be determined in the filtrate separately if required.