1.1 这些试验方法描述了用于测定总氟化物的各种类型样品分析的半自动程序。由于试验方法包括样品的微蒸馏，因此可将其应用于任何含氟溶液，其中相同成分的标准品已通过相同的样品制备程序进行，并已证明在通过半自动系统分析时可提供定量回收。相反，在证明适用性之前，不得将这些方法用于分析。 1.2 在正常使用情况下，该程序可检测0.1μg/mL的F。正常分析范围为0.1至1.6μg/mL的F。可通过使用试剂水仔细稀释样品来分析更高浓度的F。如果消化样本通常超过1。 6μg/mL F时，可以修改泵歧管的分析部分以降低灵敏度。然而，最好的程序是分析一小部分样品。当氟化物浓度下降到校准曲线的中间或上部时，可获得最准确的结果。 1.3 以国际单位制表示的数值应视为标准值。国际单位制后括号中给出的值仅供参考，不被视为标准值。 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、健康和环境实践，并确定监管限制的适用性。 看见 8.3 , 10.2.4 和 10.2.5 其他注意事项。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）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》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 这些试验方法可用于测定通过被动和主动方式（包括植物组织）从大气中收集的颗粒物和气体的氟化物含量。警告用户，被动收集器（包括植物）的氟化物含量只能对大气氟化物含量进行定性或半定量测量。

1.1 These test methods describe the semiautomated procedure for the analyses of various types of samples for the purpose of determining total fluoride. Since the test methods incorporate microdistillation of the sample, they may be applied to any fluoride-containing solution where standards of identical composition have been carried through the same sample preparation procedures and have proven to provide quantitative recovery when analyzed by the semiautomated system. Conversely, the methods shall not be applied for analyses until the applicability has been demonstrated. 1.2 In normal use, the procedure can detect 0.1 μg/mL of F. The normal range of analysis is from 0.1 to 1.6 μg/mL of F. Higher concentrations can be analyzed by careful dilution of samples with reagent water. If digested samples routinely exceed 1.6 μg/mL of F, the analytical portion of the pump manifold can be modified to reduce sensitivity. However, the best procedure is to analyze a smaller aliquot of the sample. Most accurate results are obtained when the fluoride concentration falls in the middle or upper part of the calibration curve. 1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. See 8.3 , 10.2.4 , and 10.2.5 for additional precautions. 1.5 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 These test methods may be used for determining the fluoride content of particulate matter and gases collected from the atmosphere by passive and active means, including plant tissues. The user is warned that the fluoride content of passive collectors (including plants) give only qualitative or semiquantitative measurement of atmospheric fluoride content.