1.1 本试验方法在规定的温度和相对湿度试验条件下测量木制品试样释放的空气中甲醛浓度。该小型试验箱试验方法所得结果与木材产品大试验箱试验法测试较大产品样品所得结果相比较 E1333号机组 结果可能与从试验方法中获得的值相关 E1333号机组 .小室空气样品中甲醛的数量由NIOSH的修改决定 3500变色酸试验程序。与试验方法相同 E1333号机组 其他分析程序可用于测定空气样品中的甲醛含量，前提是这些方法的结果与变色酸程序的结果相当。然而，试验结果和试验报告必须适当合格，并且必须准确描述所用的分析程序。 1.2 本试验方法测试的人造板产品的特点是用于不同的应用，并以不同的相对量或加载比进行测试，以反映不同的应用。这是一种测试方法，规定在不同产品类型的不同加载比下进行测试。然而，试验结果和试验报告必须适当合格，并且必须规定补充空气流量、样品表面积和试验室体积。 1.3 小型室内试验的理想候选产品是甲醛释放特性相对均匀的产品。然而，在选择和制备小规模室内试验样品时，必须考虑产品的不均匀性。 1.4 以国际单位表示的数值视为标准值。SI单位后括号中给出的值仅供参考，不视为标准值。 1.5 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。 1.6 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 已为使用脲醛粘合剂制造并永久安装在家中或用作橱柜组件和类似工业产品的木板建筑产品制定了甲醛排放率的上限。本试验方法拟与HUD 24所引用的用于制造房屋的试验方法以及明尼苏达州法规所引用的住房单元和建筑材料的试验方法结合使用。 该方法也可用于监测产品是否符合加利福尼亚州空气资源委员会（CARB）关于复合木材产品的规定以及美国环保局复合木材产品甲醛排放标准（EPA TSCA Title VI 40 CFR Section 770）。该测试方法提供了一种测试较小样品的方法，并减少了测试所需的时间。 4.2 通过这种小规模方法获得的甲醛浓度水平可能与全尺寸室内环境中的预期值不同。产品负荷、温度、相对湿度和空气交换的变化将影响甲醛排放率，从而可能影响室内空气甲醛浓度。 4.3 该试验方法要求使用0.02至1 m的试验室 3. 用以下受控条件评估空气中甲醛浓度的体积: 4.3.1 试验前试样的调节， 4.3.2 试验箱中试样的暴露表面积， 4.3.3 试验箱温度和相对湿度， 4.3.4 Q/A比率，以及 4.3.5 室内空气循环。

1.1 This test method measures the formaldehyde concentrations in air emitted by wood product test specimens under defined test conditions of temperature and relative humidity. Results obtained from this small-scale chamber test method are intended to be comparable to results obtained from testing larger product samples by the large chamber test method for wood products, Test Method E1333 . The results may be correlated to values obtained from Test Method E1333 . The quantity of formaldehyde in an air sample from the small chamber is determined by a modification of NIOSH 3500 chromotropic acid test procedure. As with Test Method E1333 , other analytical procedures may be used to determine the quantity of formaldehyde in the air sample provided that such methods give results comparable to those obtained by using the chromotropic acid procedure. However, the test results and test report must be properly qualified and the analytical procedure employed must be accurately described. 1.2 The wood-based panel products to be tested by this test method are characteristically used for different applications and are tested at different relative amounts or loading ratios to reflect different applications. This is a test method that specifies testing at various loading ratios for different product types. However, the test results and test report must be properly qualified and must specify the make-up air flow, sample surface area, and chamber volume. 1.3 Ideal candidates for small-scale chamber testing are products relatively homogeneous in their formaldehyde release characteristics. Still, product inhomogeneities must be considered when selecting and preparing samples for small-scale chamber testing. 1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard. 1.5 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. 1.6 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 Upper limits for the formaldehyde emission rates have been established for wood panel building products made with urea-formaldehyde adhesives and permanently installed in homes or used as components in kitchen cabinets and similar industrial products. This test method is intended for use in conjunction with the test method referenced by HUD 24 for manufactured housing and by Minnesota Statutes for housing units and building materials. This method may also be used for monitoring products for compliance to the California Air Resources Board (CARB) regulation for composite wood products and the Environmental Protection Agency Formaldehyde Emission Standards for Composite Wood Products, EPA TSCA Title VI 40 CFR Section 770. This test method provides a means of testing smaller samples and reduces the time required for testing. 4.2 Formaldehyde concentration levels obtained by this small-scale method may differ from expected in full-scale indoor environments. Variations in product loading, temperature, relative humidity, and air exchange will affect formaldehyde emission rates and thus likely indoor air formaldehyde concentrations. 4.3 This test method requires the use of a chamber of 0.02 to 1 m 3 in volume to evaluate the formaldehyde concentration in air using the following controlled conditions: 4.3.1 Conditioning of specimens prior to testing, 4.3.2 Exposed surface area of the specimens in the test chamber, 4.3.3 Test chamber temperature and relative humidity, 4.3.4 The Q/A ratio, and 4.3.5 Air circulation within the chamber.