1.1 这些试验方法包括定量测定液体松节油、松节油、双戊烯、松油、妥尔油和妥尔油脂肪酸中任何比例的溶解或闭塞水。包括三种水分测试方法。卡尔费雪滴定法是测试妥尔油的首选方法，测试方法 D803型 . 1.1.1 卡尔费休滴定法是基于水和复合试剂之间的反应 2. 由碘、二氧化硫、吡啶和甲醇组成，由此碘被转化为无色化合物。反应混合物中持久碘色的出现表明通过与试剂反应完全去除了游离水，并且可以用色度法测量终点。当水的存在所提供的阻力被消除时，自动滴定仪通过恢复电流强度来找到该终点。 安培自动滴定仪通过检测水消除后的电流来找到该终点。 1.1.2 库仑滴定法通过对足以从所需试剂中产生精确量的碘以与样品中的水反应的电流进行电子积分来确定水含量。 1.1.3 与其他样品组分相比，共沸法利用甲苯或二甲苯基质中相对较低的水沸点，从而将水收集在捕集器中并进行测量。 1.2 以国际单位制表示的值应视为标准值。本标准不包括其他测量单位。 1.3 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前建立适当的安全、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《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。 =====意义和用途====== 3.1 由于生产过程中使用的方法，许多松树化学产品都含有水分。典型的精制产品，如萜烯、松油、妥尔油脂肪酸和蒸馏妥尔油，只含有微量的水，但粗妥尔油可能含有0.5 % 至2.5 % 水。尽管卡尔·费歇尔和库仑法最适用于低水分水平，但这些方法可以在较高水平下使用。共沸蒸馏法通常用于较高的水平。

1.1 These test methods cover the quantitative determination of dissolved or occluded water present in any proportion in liquid pine chemicals, such as turpentine, pinene, dipentene, pine oil, tall oil, and tall oil fatty acids. Three methods of moisture testing are included. The Karl Fisher titration method is the preferred method for testing tall oil, Test Methods D803 . 1.1.1 The Karl Fischer Titration method is based on the reaction between water and a complex reagent 2 consisting of iodine, sulfur dioxide, pyridine, and methanol, whereby the iodine is converted to a colorless compound. The appearance of a persistent iodine color in the reaction mixture indicates the complete removal of free water by reaction with the reagent, and the endpoint may be measured colorimetrically. Automatic titrators find this endpoint by the restoration of a current strength when the resistance provided by the presence of water is eliminated. Amperometric automatic titrators find this endpoint by detecting the current flow that occurs once water is eliminated. 1.1.2 The coulometric titration method determines water content by electronic integration of a current sufficient to generate the precise amount of iodine from the required reagent to react with the water in the sample. 1.1.3 The azeotropic method utilizes the relatively low boiling point of water, as compared with other sample constituents, in a toluene or xylene matrix so that water is collected in a trap and measured. 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 ====== 3.1 Many pine chemical products contain water as a result of the processes used for their production. Typically refined products such as terpenes, pine oil, tall oil fatty acids, and distilled tall oil contain only traces of water, but crude tall oil might contain 0.5 % to 2.5 % of water. Although the Karl Fischer and coulometric methods are most applicable to low levels of moisture, these can be and are used at higher levels. The azeotropic distillation method is generally used at higher levels.