1.1 本试验方法测量了在设计用于模拟产品使用的条件下，空气中甲醛浓度和含有甲醛的木制品的排放率（参见 11.5 和 附注9 ). 空气中的浓度和排放速率是在温度和相对湿度的特定试验条件下在一个大的试验室中测定的。一般程序还用于在产品装载率和室内环境典型的空气交换率下测试产品组合 ( 1. ) . 2. 试验报告中描述了试验的产品、负载比和所用的空气交换率。 1. 2. 该试验方法测定了大量大尺寸样品的空气中甲醛平均浓度和排放率。因此，报告的平均浓度和排放率不会提供测试批次中较高或较低排放面板的信息。 1.3 这种方法主要用于测试新制造的面板产品，这些产品是为了测试用聚乙烯包裹的密封或用废纸片包裹的，或两者都用。当本试验方法用于评估除新制造的面板产品以外的其他产品（在最初应用、安装或使用后）时，应在试验报告中描述包装和装运产品进行试验的方法。 1.4 根据美国职业安全与健康研究所（NIOSH）变色酸试验程序的修改，测定从试验箱中采集的空气样品中甲醛的含量。如果使用另一种分析程序测定空气样品中的甲醛含量，则该程序的结果应与适用的变色酸程序具有同等或更高的准确度和精密度。基于乙酰丙酮、副玫瑰苯胺的详细程序（见试验方法 D5221型 )，2,4-二硝基苯肼（DNPH）（见试验方法 D5197号 )和3-甲基-2-苯并噻唑啉（MBTH）（见试验方法 D5014号 )已经发现，在准确度和精密度方面，结果与变色酸相当或更高。试验报告应注明所采用的分析程序。 注1: 3. 本试验方法中描述的变色酸分析程序适用于测试脲醛胶合木制品。根据NIOSH（第4版，8/15/94），变色酸分析程序的工作范围下限为0.02 百万分之一。如果空气中的甲醛浓度预计达到或低于此水平，建议使用更灵敏的分析程序来测试木板产品。 DNPH就是这样一种方法。 1.5 本试验方法用于确定是否符合美国住房和城市发展部（HUD）规则和条例（HUD），对建筑材料制定的要求 24 成本加运费 3280，用于制造房屋，由明尼苏达州提供 法规 部分 144.495，环保局复合木制品甲醛排放标准，EPA TSCA Title VI 40 CFR Section 770，以及加州空气资源委员会（CARB），加州法规第93120-93120.12节，Title 17，减少复合木制品中甲醛排放的空气毒性控制措施。 测量结果也用于比较空气中的浓度和不同木制品的排放率 ( 2. ) 以及确定是否符合产品标准。 1.6 本试验方法并非用于测定所有室内材料和产品的一般有机排放物。 注2: ASTM委员会 D22制定了指南 D5116型 它描述了适用于测定室内使用的材料和产品的有机排放和排放速率的小型环境设备和技术。 1.7 以国际单位表示的数值视为标准值。括号中给出的值是以英寸为单位的数学转换- 英镑单位，仅供参考，不被视为标准单位。 1.8 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。 有关具体危险说明，请参见第节 7. . 1.9 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 意义和用途: 4.1.1 对于一些永久性安装在人造房屋和传统房屋中的建筑产品，已经制定了空气中甲醛浓度的限制。该测试方法提供了测试典型产品尺寸的标准方法，如1.2 米乘以2.4 米（4 英尺乘以8 ft）板材，产品装载量与产品最终用途一致。 4.2 试验方法总结: 4.2.1 该试验方法包括一个22 米 3. (800 英尺 3. )评估指定时间内空气中甲醛浓度和建筑产品排放率的最小尺寸。 本试验方法采用一组环境条件，但产品装载率不同，以评估空气中甲醛浓度和某些木材产品的排放率。程序中控制的条件如下: 4.2.1.1 试验前试样的调节， 4.2.1.2 试验箱中试样的暴露表面积， 4.2.1.3 试验箱温度和相对湿度， 4.2.1.4 每小时换气次数，以及 4.2.1.5 室内空气循环。 4.2.1.6 16至20小时结束时 在试验室中，对空气进行采样，并测定空气中甲醛的浓度和排放率。 注3: 在将结果扩展到空气中甲醛浓度和产品在不同换气率或负荷率条件下的排放率时，必须小心。

1.1 This test method measures the formaldehyde concentration in air and emission rate from wood products containing formaldehyde under conditions designed to simulate product use (see 11.5 and Note 9 ). The concentration in air and emission rate is determined in a large chamber under specific test conditions of temperature and relative humidity. The general procedures are also intended for testing product combinations at product-loading ratios and at air-exchange rates typical of the indoor environment ( 1 ) . 2 The products tested, the loading ratios and the air exchange rates employed are described in the test report. 1.2 This test method determines the average formaldehyde concentration in air and emission rate from a number of large size samples. The average concentration and emission rate reported, thus, will not provide information on higher or lower emitting panels in the test lot. 1.3 This method is primarily used for testing newly manufactured panel products that are shipped for testing either seal-wrapped in polyethylene or with waster sheets, or with both. When this test method is used for evaluating other than newly manufactured panel products (after original application, installation or use), the method of packaging and shipping the product for testing shall be described in the test report. 1.4 The quantity of formaldehyde in the air sample taken from the chamber is determined by an adaptation of the National Institute for Occupational Safety and Health (NIOSH) chromotropic acid test procedure. If another analytical procedure is used to determine the quantity of formaldehyde in the air sample, that procedure shall give results of equivalent or greater accuracy and precision than the adapted chromotropic acid procedure. Detailed procedures based on acetylacetone, pararosaniline (see Test Method D5221 ), 2,4-dinitrophenylhydrazine (DNPH) (see Test Method D5197 ) and 3-methyl-2-benzothiazoline (MBTH) (see Test Method D5014 ) have been found to give results equivalent or greater in accuracy and precision than chromotropic acid. The test report shall note the analytical procedure employed. Note 1: 3 The chromotropic acid analytical procedure described in this test method is applicable for testing urea-formaldehyde bonded wood products. According to NIOSH (4th Edition, 8/15/94), the low end of the working range for the chromotropic acid analytical procedure is 0.02 ppm. A more sensitive analytical procedure is recommended for testing wood panel products where formaldehyde concentrations in air are anticipated to be at or below this level. DNPH is recognized as such a method. 1.5 This test method is used to determine compliance with requirements such as those established for building materials by the U.S. Department of Housing and Urban Development (HUD) Rules and Regulations, HUD 24 CFR 3280, for manufactured housing, by Minnesota Statutes Section 144.495, Environmental Protection Agency Formaldehyde Emission Standards for Composite Wood Products, EPA TSCA Title VI 40 CFR Section 770, and California Air Resources Board (CARB), California Code of Regulations sections 93120-93120.12, title 17, Airborne Toxic Control Measure to Reduce Formaldehyde Emissions from Composite Wood Products. Measurement results are also used for comparing concentrations in air and emission rates from different wood products ( 2 ) and for determining compliance with product standards. 1.6 This test method is not designed for determining general organic emissions from all indoor materials and products. Note 2: ASTM Committee D22 has developed Guide D5116 which describes small-scale environmental equipment and techniques suitable for determining organic emissions and emission rates from materials and products used indoors. 1.7 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard. 1.8 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. For specific hazard statements, see Section 7 . 1.9 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 Significance and Use: 4.1.1 Limitations on formaldehyde concentrations in air have been established for some building products permanently installed in manufactured and conventional homes. This test method provides a standard means of testing typical product sizes, such as 1.2 m by 2.4 m (4 ft by 8 ft) sheets, at product loadings consistent with product end use. 4.2 Summary of Test Method: 4.2.1 This test method incorporates a chamber of 22 m 3 (800 ft 3 ) minimum size to evaluate formaldehyde concentrations in air and emission rates from building products over a specified duration of time. This test method employs a single set of environmental conditions but different product loading ratios to assess formaldehyde concentrations in air and emission rates from certain wood products. Conditions controlled in the procedure are as follows: 4.2.1.1 Conditioning of specimens prior to testing, 4.2.1.2 Exposed surface area of the specimens in the test chamber, 4.2.1.3 Test chamber temperature and relative humidity, 4.2.1.4 Number of air changes per hour, and 4.2.1.5 Air circulation within the chamber. 4.2.1.6 At the end of a 16 to 20-h period in the test chamber, the air is sampled and the concentration of formaldehyde in air and emission rate are determined. Note 3: Care must be exercised in the extension of the results to formaldehyde concentrations in air and emission rates from products under different conditions of air change rate or loading ratio, or both.