1.1本试验方法包括测定液化石油气中38℃以上风化的外来物质。外来物质通常会溶解在液化石油气中，但在某些情况下可能会发生相分离。 1.2通过本试验方法，含有某些防冰添加剂的液化石油气可能会得出错误的结果。 1.3尽管本试验方法多年来一直用于验证丙烷的清洁度和缺乏重污染物，但其灵敏度可能不足以保护某些设备免受操作问题或增加维护的影响。某些应用可能需要更敏感的测试，能够检测较低水平的溶解污染物。 1.4本标准无意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====== 残渣含量控制（规范D 1835要求 )在液化石油气的最终应用中具有相当重要的意义。在液体进料系统中，残留物可能会导致麻烦的沉积物，在蒸汽提取系统中，残留下来的残留物可能会污染调节设备。残留的会积聚，具有腐蚀性，并会污染以下产品。 水，尤其是碱性水，会导致调节设备故障和金属腐蚀。

1.1 This test method covers the determination of extraneous materials weathering above 38C that are present in liquefied petroleum gases. The extraneous materials will generally be dissolved in the LPG, but may have phase-separated in some instances. 1.2 Liquefied petroleum gases that contain certain anti-icing additives can give erroneous results by this test method. 1.3 Although this test method has been used to verify cleanliness and lack of heavy contaminants in propane for many years, it might not be sensitive enough to protect some equipment from operational problems or increased maintenance. A more sensitive test, able to detect lower levels of dissolved contaminants, could be required for some applications. 1.4 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. ====== Significance And Use ====== Control over the residue content (required by Specification D 1835 ) is of considerable importance in end-use applications of LPG. In liquid feed systems residues can lead to troublesome deposits and, in vapor withdrawal systems, residues that are carried over can foul regulating equipment. Those that remain will accumulate, can be corrosive, and will contaminate following product. Water, particularly if alkaline, can cause failure of regulating equipment and corrosion of metals.