1.1 本试验方法涵盖过氧化氢的测定，包括过氧化氢（H 2. O 2. )并结合有机过氧化物，在大气水样中通过辣根过氧化物酶衍生和衍生二聚体荧光分析的方法。 2. , 3. 1.2 适用过氧化氢浓度范围确定为0.6–176.0×10 −6. M来自试验方法的独立实验室试验。 1.3 本试验方法主要用于过氧化氢，但也可用于定量有机过氧化氢。高达30×10的有机过氧化氢浓度水平的测定 −6. 可通过过氧化氢校准充分获得M。 2. , 3. 虽然在雨水或云水中未检测到明显浓度水平的有机氢过氧化物，但可通过添加过氧化氢酶以破坏H 2. O 2. . 3. 1.4 由于大气水样中过氧化氢的不稳定性，适当的样品采集、采集时衍生化和严格的质量控制是分析过程的基本方面。 1.5 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.6 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。 1.7 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 过氧化氢（在大气中光化学形成）是大气水中溶解二氧化硫的主要氧化剂。H的检测 2. O 2. 在大气中，水有助于推断气相H 2. O 2. 用于评估特定大气条件下各种酸化机制的相对重要性。 5.2 待分析样品中的氢过氧化物在水中不稳定，并且由于细菌作用或与其他成分的化学反应，可以快速衰减。该测试方法包括样品衍生程序以及过氧化氢衰减的估计和校正方法。

1.1 This test method covers the determination of hydroperoxides, which include hydrogen peroxide (H 2 O 2 ) and combined organic peroxides, in samples of atmospheric water by the method of horseradish peroxidase derivatization and fluorescence analysis of the derived dimer. 2 , 3 1.2 The range of applicable hydrogen peroxide concentrations was determined to be 0.6–176.0 × 10 −6 M from independent laboratory tests of the test method. 1.3 The primary use of the test method is for hydrogen peroxide, but it may also be used to quantitate organic hydroperoxides. Determinations of organic hydroperoxide concentration levels up to 30 × 10 −6 M may be adequately obtained by calibration with hydrogen peroxide. 2 , 3 While organic hydroperoxides have not been detected at significant concentration levels in rain or cloud water, their presence may be tested by operation of the test method with the addition of catalase for destruction of H 2 O 2 . 3 1.4 Because of the instability of hydroperoxides in atmospheric water samples, proper sample collection, at-collection derivatization, and stringent quality control are essential aspects of the analytical process. 1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.6 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. 1.7 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 Hydrogen peroxide (formed photochemically in the atmosphere) is a primary oxidizer of dissolved sulfur dioxide in atmospheric water. Detection of H 2 O 2 in atmospheric water is useful for inferring gas-phase H 2 O 2 concentrations and for assessing the relative importance of various acidifying mechanisms under specific atmospheric conditions. 5.2 Hydroperoxides in samples to be analyzed are unstable in water and can decay rapidly due to bacterial action or chemical reaction with other constituents. The test method includes procedures for sample derivatization and methods for estimating and correcting for hydroperoxide decay.