1.1 本试验方法描述了通过原子发射光谱法对镁及其合金进行分析。待分析的镁试样可以是冷铸圆盘、铸件、薄板、板材、挤压件或其他锻造形式或形状。下表列出了该方法范围内的要素。 要素 质量分数范围（Wt%） 铝 0.001至12.0 铍 0.0001至0.01 硼 0.0001至0.01 镉 0.0001至0.05 钙 0.0005至0.05 铈 0.01至3.0 铬 0.0002至0.005 铜 0.001至0.05 镝 0.01至1.0 铒 0.01至1.0 钆 0.01至3.0 铁 0.001至0.06 镧 0.01至1.5 领导 0.005至0.1 锂 0.001至0.05 锰 0.001至2.0 钕 0.01至3.0 镍 0.0005至0.05 磷 0.0002至0.01 镨 0.01至0.5 钐 0.01至1.0 硅 0.002至5.0 银 0.001至0.2 钠 0.0005至0.01 锶 0.01至4.0 锡 0. 002至0.05 钛 0.001至0.02 钇 0.02至7.0 镱 0.01至1.0 锌 0.001至10.0 锆 0.001至1.0 注1: 上述范围中给出的质量分数范围是基于两个制造商的观测结果和原子发射光谱仪供应商提供的数据进行的估计。每个元素显示的范围并不能证明该元素的实际可用分析范围。根据单个仪器的能力、所使用的特定元素波长的光谱特性以及适当参考材料的可用性，可用的分析范围可以扩大得更高或更低。 1.2 该试验方法主要适用于《取样规程》中所述的冷铸造圆盘的分析 B953型 可以分析其他形式，前提是: (1) 它们足够大以防止过度加热， (2) 它们允许进行机械加工，以提供一个干净、平坦的表面，从而在试样和火花台之间形成密封，以及 (3) 具有类似冶金条件（光谱化学响应）和化学成分的参考材料是可用的。 1.3 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。 具体的安全和健康声明见第节 10 . 1.4 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 镁及其合金的冶金性能在很大程度上取决于化学成分。 精确和准确的分析对于获得所需的性能、满足客户规范以及帮助减少因不合格材料而产生的废料至关重要。 5.2 本试验方法适用于《规程》中规定的冷铸试样 B953型 并且也可以应用于其他类型的样品，前提是可以获得合适的参考材料。

1.1 This test method describes the analysis of magnesium and its alloys by atomic emission spectrometry. The magnesium specimen to be analyzed may be in the form of a chill cast disk, casting, sheet, plate, extrusion or some other wrought form or shape. The elements covered in the scope of this method are listed in the table below. Element Mass Fraction Range (Wt %) Aluminum 0.001 to 12.0 Beryllium 0.0001 to 0.01 Boron 0.0001 to 0.01 Cadmium 0.0001 to 0.05 Calcium 0.0005 to 0.05 Cerium 0.01 to 3.0 Chromium 0.0002 to 0.005 Copper 0.001 to 0.05 Dysprosium 0.01 to 1.0 Erbium 0.01 to 1.0 Gadolinium 0.01 to 3.0 Iron 0.001 to 0.06 Lanthanum 0.01 to 1.5 Lead 0.005 to 0.1 Lithium 0.001 to 0.05 Manganese 0.001 to 2.0 Neodymium 0.01 to 3.0 Nickel 0.0005 to 0.05 Phosphorus 0.0002 to 0.01 Praseodymium 0.01 to 0.5 Samarium 0.01 to 1.0 Silicon 0.002 to 5.0 Silver 0.001 to 0.2 Sodium 0.0005 to 0.01 Strontium 0.01 to 4.0 Tin 0.002 to 0.05 Titanium 0.001 to 0.02 Yttrium 0.02 to 7.0 Ytterbium 0.01 to 1.0 Zinc 0.001 to 10.0 Zirconium 0.001 to 1.0 Note 1: The mass fraction ranges given in the above scope are estimates based on two manufacturers observations and data provided by a supplier of atomic emission spectrometers. The range shown for each element does not demonstrate the actual usable analytical range for that element. The usable analytical range may be extended higher or lower based on individual instrument capability, spectral characteristics of the specific element wavelength being used and the availability of appropriate reference materials. 1.2 This test method is suitable primarily for the analysis of chill cast disks as described in Sampling Practice B953 . Other forms may be analyzed, provided that: (1) they are sufficiently massive to prevent undue heating, (2) they allow machining to provide a clean, flat surface which creates a seal between the specimen and the spark stand, and (3) reference materials of a similar metallurgical condition (spectrochemical response) and chemical composition are available. 1.3 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. Specific safety and health statements are given in Section 10 . 1.4 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 The metallurgical properties of magnesium and its alloys are highly dependant on chemical composition. Precise and accurate analyses are essential to obtaining desired properties, meeting customer specifications and helping to reduce scrap due to off-grade material. 5.2 This test method is applicable to chill cast specimens as defined in Practice B953 and can also be applied to other types of samples provided that suitable reference materials are available.