1.1 本试验方法描述了通过电感耦合等离子体原子发射光谱法（ICP-AES）测定绝缘油中的金属和污染物。中列出了具体的元素 表1 .本试验方法与试验方法相似 D5185 ，但方法不同，这导致绝缘油应用所需的更高灵敏度。 1.2 本试验方法使用油溶性金属进行校准，并不旨在定量测定不溶性颗粒。分析结果取决于颗粒尺寸，对于大于几微米的颗粒，获得的结果很低。 2. 1.3 该试验方法确定了溶解的金属（可能源于过热或电弧，或两者兼有）和部分颗粒金属（通常源于磨损机制）。虽然这种ICP方法检测到几乎所有小于几微米的颗粒，但较大颗粒的响应随着颗粒尺寸的增加而降低，因为较大颗粒不太可能通过喷雾器进入样品激发区。 1.4 该测试方法包括过滤油样的选项，供那些希望分别测定溶解金属和颗粒金属（以及总金属）的用户使用。 1.5 浓度高于校准曲线上限的元素可以通过额外的适当稀释进行测定，且不会降低精度。 1.6 以国际单位制表示的数值应视为标准。本标准不包括其他计量单位。 1.7 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。 1.8 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====== 5.1 该试验方法涵盖了绝缘油中12种元素的快速测定，并对使用过的油进行了磨损迹象的快速筛选。每个试样的测试时间约为几分钟，可检测性在10 μg/kg至100 μg/kg范围内。 5.2 此测试方法可用于监测设备状况，并有助于确定何时需要采取纠正措施。它还可以用于检测污染，例如来自硅油（通过硅）或来自污垢（通过硅和铝）。 5.3 该试验方法可用于指示回收使用过的绝缘油的效率。

1.1 This test method describes the determination of metals and contaminants in insulating oils by inductively coupled plasma atomic emission spectrometry (ICP-AES). The specific elements are listed in Table 1 . This test method is similar to Test Method D5185 , but differs in methodology, which results in the greater sensitivity required for insulating oil applications. 1.2 This test method uses oil-soluble metals for calibration and does not purport to quantitatively determine insoluble particulates. Analytical results are particle size dependent, and low results are obtained for particles larger than several micrometers. 2 1.3 This test method determines the dissolved metals (which can originate from overheating or arcing, or both) and a portion of the particulate metals (which generally originate from a wear mechanism). While this ICP method detects nearly all particles less than several micrometers, the response of larger particles decreases with increasing particle size because larger particles are less likely to make it through the nebulizer and into the sample excitation zone. 1.4 This test method includes an option for filtering the oil sample for those users who wish to separately determine dissolved metals and particulate metals (and hence, total metals). 1.5 Elements present at concentrations above the upper limit of the calibration curves can be determined with additional, appropriate dilutions and with no degradation of precision. 1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.7 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. 1.8 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 ====== 5.1 This test method covers the rapid determination of 12 elements in insulating oils, and it provides rapid screening of used oils for indications of wear. Test times approximate several minutes per test specimen, and detectability is in the 10 μg/kg through 100 μg/kg range. 5.2 This test method can be used to monitor equipment condition and help to define when corrective action is needed. It can also be used to detect contamination such as from silicone fluids (via Silicon) or from dirt (via Silicon and Aluminum). 5.3 This test method can be used to indicate the efficiency of reclaiming used insulating oil.