1.1本规程适用于可能含有挥发性废物成分的土壤。 1.2本规程提供了使用一次性En岩心取样器收集和储存土壤样品以进行挥发性有机物分析的程序。 1.3建议将本标准与指南D 4547结合使用 和指南D 4687 . 1.4以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.5 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 笔记 1-ASTM对与本标准提及的任何项目有关的任何专利权的有效性不采取任何立场。明确建议本标准的用户，确定任何此类专利权的有效性以及侵犯此类权利的风险完全由其自行负责。 ====意义和用途====== 本规程用于收集和储存5-g或25-g土壤样品，以进行挥发性有机物分析，同时尽量减少因挥发或生物降解或两者引起的污染物损失。En岩心取样器既是采样装置又是样品储存室。 在实践中，土壤样品结构的完整性在样品收集、储存和转移到实验室进行分析或保存期间得到保持。 在样品收集、储存和转移过程中，样品暴露在大气中的程度非常有限。 执行此操作时，不需要实验室二次采样。样品直接从取芯体/储存室排出，放入适当的容器中进行分析或保存，而不会破坏样品的完整性。不应从En-Core设备中进行二次采样，以获得较小的样本量进行分析。 本规程规定了在4℃时将样品储存在En岩心取样器中 ± 2. ° C最多48小时；在 – 7至 – 21 ° C最多14天；或在4 ± 2. ° C最多48小时，然后在 – 7至 – 21 ° C最多五天（有关En岩芯取样器在这些储存条件下的性能信息，请参阅附录X1和脚注4、5和6中引用的报告）。 , , 将样品储存在En岩心取样器中，4 ± 2. ° C或 – 7至 – 21 ° C如果可以证明使用的更长存储时间不会影响样品中感兴趣的挥发性有机化合物的浓度，或者通过分析样品生成的数据符合DQOs，则可以选择比上述时间更长的保存时间（见实施规程D 5792） ). 本规程不在现场使用甲醇防腐剂或其他化学防腐剂。因此，不存在与易燃性危险、运输限制或由于向现场样品中添加溶剂而稀释低挥发性浓度样品相关的问题。 En-Core取样器是一种一次性设备。不应清洗或重复使用，或两者兼而有之。 本规程不能用于对胶结材料、固结材料或碎片粗到足以干扰适当取芯技术的材料进行取样。 图1:En岩心取样器的组件 图2:En岩心取样器的可重复使用附件

1.1 This practice is intended for application to soils that may contain volatile waste constituents. 1.2 This practice provides a procedure for using the disposable En Core sampler to collect and store a soil sample for volatile organic analysis. 1.3 It is recommended that this standard be used in conjunction with Guide D 4547 and Guide D 4687 . 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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 and health practices and determine the applicability of regulatory limitations prior to use. Note 1—ASTM takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. ====== Significance And Use ====== This practice is for use in collecting and storing 5- or 25-g soil samples for volatile organic analysis in a manner that minimizes loss of contaminants due to volatilization, or biodegradation, or both. The En Core sampler serves as both the sampling device and sample storage chamber. In performing the practice, the integrity of the soil sample structure is maintained during sample collection, storage, and transfer in the laboratory for analysis or preservation. During sample collection, storage, and transfer, there is very limited exposure of the sample to the atmosphere. Laboratory subsampling is not required when performing this practice. The sample is expelled directly from the coring body/storage chamber into the appropriate container for analysis or preservation without disrupting the integrity of the sample. Subsampling from the En Core device should not be performed to obtain smaller sample sizes for analysis. This practice specifies sample storage in the En Core sampler at 4 ± 2 ° C for up to 48 h; at – 7 to – 21 ° C for up to 14 days; or at 4 ± 2 ° C for up to 48 h followed by storage at – 7 to – 21 ° C for up to five days (see Appendix X1 and reports referenced in footnotes 4, 5, and 6 for information on the performance of the En Core sampler under these storage conditions). , , Storage of samples in the En Core sampler at 4 ± 2 ° C or – 7 to – 21 ° C for longer holding times than those listed above is an option, provided it can be shown that the longer storage time used does not influence the concentrations of the VOCs of interest in the samples, or that the data generated by analysis of the samples meet the DQOs (see Practice D 5792 ). This practice does not use methanol preservation or other chemical preservatives in the field. As a result, there are no problems associated with flammability hazards, shipping restrictions, or dilution of samples containing low volatile concentrations due to solvents being added to samples in the field. The En Core sampler is a single-use device. It should not be cleaned, or reused, or both. This practice cannot be used for sampling cemented material, consolidated material, or material having fragments coarse enough to interfere with proper coring techniques. FIG. 1 Components of the En Core Sampler FIG. 2 Reusable Attachments to the En Core Sampler