1.1本试验方法包括测定土壤、弃土、粉煤灰和其他土壤替代物中几种元素的数量（Q）和强度（I）结果，以确定其对植被生长的适应性以及金属对食物链的可能不利影响。 1.2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。 1.3所有测量值和计算值应符合实施规程D6026中规定的有效数字和舍入准则。 1.4 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。 ====意义和用途====== 5.1化学元素的生物有效性与土壤和含有矿物或任何类型吸附相的植物生长介质的化学成分关系不大。化学势（元素i的pi）是强度参数（i），与土壤溶液平衡的吸附量是量（Q）的度量。每种元素（必需或有毒）的这些参数应在存在其他元素或接近所需强度的情况下测量。 该测试方法是同时生成多个元素的这些结果的唯一方法。计算机软件允许这些值与不同元素的总吸附量相关。对于许多基质，已发现该方法的理论适用于在许多非土壤基质上建立植被的程度，并通过该测试方法评估了土壤-水食物链问题。该测试方法已在宾夕法尼亚州和其他地方的许多地点使用，以监测污水污泥作为植物必需元素的来源对土地的影响，对食物链没有有害影响。 它还被用于评估仅由粉煤灰或作为煤矸石成分产生的合成土壤，以在矿井弃土、煤矸石堆和废弃矿区建立植被。 注1 — 本标准产生的结果的质量取决于执行该标准的人员的能力，以及所用设备和设施的适用性。符合实施规程D3740标准的机构通常被认为能够胜任和客观的测试/采样/检查等。本标准的用户应注意，遵守实施规程D3740本身并不能确保可靠的结果。 可靠的结果取决于许多因素；实践D3740提供了评估其中一些因素的方法。

1.1 This test method covers the determination of quantity (Q) and intensity (I) results for several elements in soils, spoils, fly-ash, and other soil substitutes to ascertain their suitability for the growth of vegetation and possible adverse effects of metals on the food chain. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 All measured and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D6026. 1.4 This standard does not purport to address all of the safety problems, 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. ====== Significance And Use ====== 5.1 The bioavailability of chemical elements is poorly related to the chemical composition of soils and plant growth media containing a mineral or any type of adsorbed phase. The chemical potential (pi for element, i,) is an intensity parameter (I), and the sorbed amount in equilibrium with the soil solution is a measure of the quantity (Q). These parameters for each element (essential or toxic) should be measured in the presence of other elements at or near the desired intensity. This test method is the only method that generates these results simultaneously for several elements. The computer software allows these values to be related to the total sorbed quantities of the different elements. For many substrates, it has been found that the theory for the method holds to the degree that vegetation has been established on many non-soil substrates and soil-water-food chain problems have been evaluated by this test method. This test method has been used on many sites in Pennsylvania and other locations to monitor the effect of sewage sludge applications on land as a source of essential elements for plants with no harmful effects on the food chain. It has also been used to evaluate synthetic soils produced from fly-ash alone or as a component of coal refuse for the establishment of vegetation on mine spoils, coal refuse piles, and abandoned mine lands. Note 1 — The quality of the result produced by this standard is dependent on the competence of the personnel performing it, and the suitability of the equipment and facilities used. Agencies that meet the criteria of Practice D3740 are generally considered capable of competent and objective testing/sampling/inspection and the like. Users of this standard are cautioned that compliance with Practice D3740 does not in itself assure reliable results. Reliable results depend on many factors; Practice D3740 provides a means of evaluating some of those factors.