1.1 这些实践涵盖了通过E01标准方法对金属、矿石和相关材料进行化学分析所需的实验室仪器和试剂。推荐仪器的详细说明以及标准溶液和某些非标准化试剂的制备详细说明将在单独的分析方法中列出或指定。这里包括关于试剂纯度和使用危险试剂的保护措施的一般建议。 1.2 这些建议旨在适用于E01金属、矿石和相关材料的化学分析方法，当明确参考这些实践时，如第节所述 4. . 1.3 以国际单位制表示的值被视为标准值。 1.4 本标准并不旨在解决与其使用相关的所有安全问题（如果有的话）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 具体危害见第节 8. . 注1: 本标准中动词“应”和“必须”（具有强制性第三人含义）的使用仅限于已知存在监管要求的实验室安全方面。 然而，这些规定超出了这些做法的范围。 1.5 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====== 4.1 在任何标准中（最好在范围一节之后）包含以下段落或适当的等效内容，是对该标准中要求的仪器和试剂受这些实践中规定的建议约束的正式通知。 “ 仪器和试剂 --每次测定所需的仪器和试剂在程序前的单独章节中列出。仪器、标准溶液和某些其他试剂应符合E01规程中规定的要求 E50 ，用于金属、矿石和相关材料化学分析的仪器、试剂和安全考虑。” A. 实验室试剂浓度见 表2 . †ACS规范存在，但并未涵盖所有要求。 *存在ACS规范的试剂。 B 含有至少50%的H 3. 人事军官 2. . 4.2 假设这些实践的用户将是经过培训的分析师，能够熟练、安全地执行常见的实验室程序。预计工作将在设备齐全的实验室进行。

1.1 These practices cover laboratory apparatus and reagents that are required for the chemical analysis of metals, ores and related materials by standard methods of E01. Detailed descriptions of recommended apparatus and detailed instructions for the preparation of standard solutions and certain nonstandardized reagents will be found listed or specified in the individual methods of analysis. Included here are general recommendations on the purity of reagents and protective measures for the use of hazardous reagents. 1.2 These recommendations are intended to apply to the E01 methods of chemical analysis of metals, ores and related materials when definite reference is made to these practices, as covered in Section 4 . 1.3 The values stated in SI units are regarded as 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. Specific hazards are given in Section 8 . Note 1: The use of the verbs “shall” and “must” (with their obligatory third person meaning) in this standard has been confined to those aspects of laboratory safety where regulatory requirements are known to exist. Such regulations, however, are beyond the scope of these practices. 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 ====== 4.1 The inclusion of the following paragraph, or a suitable equivalent, in any standard (preferably after the section on Scope) is due notification that the apparatus and reagents required in that standard are subject to the recommendations prescribed in these practices. “ Apparatus and Reagents —Apparatus and reagents required for each determination are listed in separate sections preceding the procedure. Apparatus, standard solutions, and certain other reagents should conform to the requirements prescribed in E01 Practices E50 , for Apparatus, Reagents, and Safety Considerations for Chemical Analysis of Metals, Ores, and Related Materials.” (A) For concentration of laboratory reagent, see Table 2 . † ACS specification exists but does not cover all requirements. * Reagent on which ACS specifications exist. (B) Contains at least 50 % H 3 PO 2 . 4.2 It is assumed that the users of these practices will be trained analysts capable of performing common laboratory procedures skillfully and safely. It is expected that work will be performed in a properly equipped laboratory.