1.1 本试验方法包括测定木材或棉花纤维素纸浆中的铁、铜、锰和钙含量。 1.2 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 纸浆中的锰是氧化纤维素的催化剂。 4.2 纸浆中的铁会导致粘胶纤维变黄，并影响醋酸纤维素塑料的颜色。铁也会导致照相纸和蓝图纸出现问题。 4.3 纸浆中的铜可以作为氧化纤维素的阻燃剂，并影响粘胶的成熟。铜干扰人造丝纤维的染色水平，并影响醋酸纤维素塑料的颜色。 4.4 纸浆中的钙会在加工成醋酸盐、人造丝、玻璃纸等过程中产生问题。钙会在粘胶纺丝和流延膜操作中产生不良沉积物。钙会影响醋酸纤维素生产过程中的粘度控制。

1.1 This test method covers the determination of the iron, copper, manganese, and calcium content of cellulose pulp from wood or cotton. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 Manganese in pulp acts as a catalyst in oxidizing cellulose. 4.2 Iron in pulp can cause yellowness in rayon fibers and influence cellulose acetate plastics color. Iron also causes problems in photographic and blueprint papers. 4.3 Copper in pulp can act as a retardant in oxidizing cellulose and can affect viscose ripening. Copper interferes with the dye level of rayon fibers and influences cellulose acetate plastics color. 4.4 Calcium in pulps can cause problems in processing into acetate, rayon, cellophane, etc. Calcium can create undesirable deposits in viscose spinning and film casting operation. Calcium can influence viscosity control during cellulose acetate manufacture.