1.1 本规程提供了用于定量淀粉和纤维素含量转换部分的取样、测试和计算方法的标准。此外，本规程涵盖了与燃料乙醇生产设施转化前和转化后样品的取样和测试相关的标准误差管理程序。 1.1.1 该实践可用于确定根据美国可再生燃料标准（RFS）有资格产生D3 RIN的淀粉和纤维素材料同时转化产生的可再生燃料的体积。 1.2 本规程涵盖了非均质材料的收集和测试，包括但不限于:玉米、高粱、小麦、土豆泥、啤酒、整个蒸馏器、含可溶性干酒糟（DDGS）和干酒糟。 1.3 这种做法旨在用于生产可再生醇的可再生燃料生产设施。未审查在任何其他类型的过程中使用此做法的情况。 1.4 只要遵循本规程的标准，就可以使用手动或自动采样技术来使用本规程。 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》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 4.1 2014年，美国环保局公布了在RFS计划下增加可再生燃料途径的最终规则。规则将内核纤维限定为满足60 % 减少温室气体（GHG），并有资格产生D3 RIN。这些规则允许两种内核光纤转换方法（CFR 40，第80部分和EPA-RQ-OAR-2012-0401；FRL-9910-40-OAR）: 4.1.1 纤维素燃料的生产者来源于主要为纤维素的原料的转化，其中“主要为纤维素”被定义为平均调整后纤维素含量为75的原料 %, 以干质量为基础测量；此外，这种“调整的纤维素含量”是指有机（非灰分）材料的百分比，即纤维素、半纤维素或木质素（CFR 40，第80部分和EPA- HQ-OAR-2012-0401；FRL-9910-40-OAR）。 4.1.2 纤维素燃料的生产者来源于主要是纤维素的原料和不主要是纤维素原料的原料的同时转化（CFR 40，第80部分和EPA-AQ-OAR-2012-0401；FRL-9910-40-OAR）。 4.2 希望获得对声称同时转化主要为纤维素的原料和不主要为纤维素原料的途径的批准的生产商，需要量化专门从纤维素含量和淀粉中提取的可再生燃料的量。为了实现这一点，生产者需要在转化过程开始之前和转化过程完成之后量化存在的纤维素含量和淀粉的量。转化前后纤维素含量和淀粉含量的这些测量值用于计算每种物质的转化分数，然后将其用于相应生产的可再生燃料的比例，并为这些相应的加仑分配D6或D3 RIN代码（CFR 40，第80部分和EPA- HQ-OAR-2012-0401；FRL-9910-40-OAR）。

1.1 This practice provides criteria for the sampling, testing, and calculation methodologies used for the quantification of the converted fraction of starch and cellulosic content. Furthermore, this practice covers procedures for the management of the standard error associated with the sampling and testing of before conversion and after conversion samples from a fuel ethanol production facility. 1.1.1 This practice can be used to determine the volume of renewable fuel produced from the simultaneous conversion of starch and cellulosic material eligible for generating D3 RINs under the United States (U.S.) Renewable Fuel Standard (RFS). 1.2 This practice covers the collection and testing of heterogeneous material, including, but not limited to: corn, sorghum, wheat, mash, beer, whole stillage, dried distillers grains with solubles (DDGS), and dried distillers grains. 1.3 This practice is intended to be used in renewable fuel production facilities designed to produce renewable alcohols. Use of this practice in any other type of process has not been reviewed. 1.4 This practice can be utilized using either manual or automatic sampling techniques, so long as the criteria of this practice are followed. 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 In 2014, the U.S. EPA published the final rules adding renewable fuel pathways under the RFS Program. The rules qualified kernel fiber as a cellulosic feedstock meeting the 60 % greenhouse gas (GHG) reduction and qualifies for the generation of D3 RINs. These rules allow for two approaches for kernel fiber conversion (CFR 40, Part 80 and EPA-HQ-OAR-2012-0401; FRL-9910-40-OAR): 4.1.1 Producers of cellulosic fuels derived from conversion of feedstocks that are predominantly cellulosic, where “predominantly cellulosic” is defined as feedstock that has an average adjusted cellulosic content of 75 %, measured on a dry mass basis; furthermore, this ‘‘adjusted cellulosic content’’ is the percent of organic (non-ash) material that is cellulose, hemicellulose, or lignin (CFR 40, Part 80 and EPA-HQ-OAR-2012-0401; FRL-9910-40-OAR). 4.1.2 Producers of cellulosic fuels derived from the simultaneous conversion of feedstocks that are predominantly cellulosic and feedstocks that are not predominantly cellulosic (CFR 40, Part 80 and EPA-HQ-OAR-2012-0401; FRL-9910-40-OAR). 4.2 Producers that wish to gain approval to the pathway that claims simultaneous conversion of feedstocks that are predominantly cellulosic and feedstocks that are not predominantly cellulosic are required to quantify the amount of renewable fuel that is derived specifically from cellulosic content and from starch. To accomplish this, the producer needs to quantify the amount of cellulosic content and starch present before the conversion process begins and after the conversion process is complete. These measurements of cellulosic content and starch content before and after conversion are used to calculate a converted fraction of each, which is then used to ratio the renewable fuel produced accordingly and assign those respective gallons the D6 or D3 RIN code (CFR 40, Part 80 and EPA-HQ-OAR-2012-0401; FRL-9910-40-OAR).