1.1 本规范测量溶剂型和水性油漆及相关涂料的挥发性有机化合物（VOC）含量，该含量由在规定的烘烤条件下从样品中释放的材料量确定，并减去豁免的挥发性化合物和水（如果存在）。 附注1: 在美国环保局的控制下，VOC的监管定义可能会发生变化。为确保货币，请联系当地空气污染控制机构。 1.2 本实施规程为选择合适的ASTM测试方法测定VOC含量提供了指南。 1.3 在特定烘烤条件下可能释放的某些有机化合物不计入涂层VOC含量，因为它们不明显参与大气光化学反应。这种可忽略的光化学反应性化合物在本实践中被称为豁免挥发性化合物。附注2: 有关美国环保局对挥发性有机化合物的定义以及目前美国环保局批准的用于涂料的豁免挥发性化合物清单的信息，请参见 附录X3 . 1.4 VOC含量计算为（ 1 ）涂层体积较少的水和免除挥发性化合物，（ 2 ）涂层固体的体积，和（ 3 )涂层固体的重量。 1.5 以SI单位表示的值将被视为标准值。 1.6 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。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法规限制的适用性。 1.7 本国际标准是根据国际公认的标准化原则制定的，该原则载于国际标准、指南和建议的制定原则世界贸易组织技术性贸易壁垒委员会。 ======意义和用途====== 5.1 本实践讨论了用于测定油漆和相关涂料的VOC含量的适用ASTM测试方法，并提供了以VOC质量表示的VOC含量的计算公式:（ 1 ）每单位体积涂料少水，免除挥发性化合物，（ 2 )每单位体积的涂料固体，和( 3 )每单位质量的涂料固体。 5.2 挥发性有机化合物含量用于比较用于相同应用的不同涂料的VOC释放量，即涂布相同面积至相同干膜厚度（假设相同应用效率）。 5.3 各种监管机构都需要VOC含量数据。 5.4 仅将VOC含量表示为涂料固体体积的函数，就给出了用于相同应用的不同涂料释放的VOC差异的线性量度。附注4: 因此，假设相同的转移效率，VOC含量为3磅VOC/gal固体的涂层将释放 1 / 2 挥发性有机化合物会使涂层含有6磅挥发性有机化合物/加仑固体。 5.5 当VOC含量表示为较少水和豁免溶剂的涂层体积的函数时，所获得的值不考虑被比较的涂层的体积固体含量的差异；因此，该表达式不能提供从用于相同应用的不同涂层发射的VOC差异的线性测量。 附注5: 因此，VOC含量为3lb VOC/gal较少的水和免除挥发性化合物的涂层将比具有6lb VOC/gal较少的水和免除挥发性化合物的涂层少释放约85%的VOC。

1.1 This practice measures the volatile organic compound (VOC) content of solventborne and waterborne paints and related coatings as determined from the quantity of material released from a sample under specified bake conditions and subtracting exempt volatile compounds and water, if present. Note 1: The regulatory definition of VOC, under the control of the U.S. EPA, can change. To ensure currency, contact the local air pollution control agency. 1.2 This practice provides a guide to the selection of appropriate ASTM test methods for the determination of VOC content. 1.3 Certain organic compounds that may be released under the specified bake conditions are not counted toward coating VOC content because they do not participate appreciably in atmospheric photochemical reactions. Such negligibly photochemically reactive compounds are referred to as exempt volatile compounds in this practice. Note 2: Information on the US EPA definition of VOC and a list of the current US EPA approved exempt volatile compounds which have been used in coatings, are provided in Appendix X3 . 1.4 VOC content is calculated as a function of ( 1 ) the volume of coating less water and exempt volatile compounds, ( 2 ) the volume of coating solids, and ( 3 ) the weight of coating solids. 1.5 The values stated in SI units are to be regarded as standard. 1.6 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. 1.7 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 ====== 5.1 This practice discusses applicable ASTM test methods used in the determination of the VOC content of paints and related coatings and provides equations for calculating the VOC content expressed as the mass of VOC: ( 1 ) per unit volume of coating less water and exempt volatile compounds, ( 2 ) per unit volume of coating solids, and ( 3 ) per unit mass of coating solids. 5.2 Volatile organic compound content is used to compare the amount of VOC released from different coatings used for the same application, that is, to coat the same area to the same dry film thickness (assuming the same application efficiency). 5.3 VOC content data are required by various regulatory agencies. 5.4 Only the expression of VOC content as a function of the volume of coating solids gives a linear measure of the difference in VOC released from different coatings used for the same application. Note 4: Thus assuming the same transfer efficiency, a coating with VOC content of 3 lb of VOC/gal of solids would release 1 / 2 the VOC that would a coating with 6 lb of VOC/gal of solids. 5.5 When VOC content is expressed as a function of the volume of coating less water and exempt solvents, the values obtained do not account for differences in the volume solids content of the coatings being compared; this expression, therefore, does not provide a linear measure of the difference in VOC emitted from different coatings used for the same application. Note 5: Thus, a coating with VOC content of 3 lb of VOC/gal less water and exempt volatile compounds would release about 85 % less VOC than a coating with 6 lb of VOC/gal less water and exempt volatile compounds.