ASTM D6363-1998(2009)e1
用过氧化物酶荧光法测定大气水样中过氧化氢和合成有机过氧化物的标准试验方法
Standard Test Method for Determination of Hydrogen Peroxide and Combined Organic Peroxides in Atmospheric Water Samples by Peroxidase Enzyme Fluorescence Method
ASTM D6363-1998(2009)e1 中，可能用到以下耗材
- 标准号
- ASTM D6363-1998(2009)e1
- 发布日期
- 1998年
- 实施日期
- 废止日期
- 无
- 中国标准分类号
- Z16
- 国际标准分类号
- 13.060.50 (Examination of water for chemical subst
- 发布单位
- US-ASTM
- 适用范围
Hydrogen peroxide (formed photochemically in the atmosphere) is a primary oxidizer of dissolved sulfur dioxide in atmospheric water. Detection of H2O2 in atmospheric water is useful for inferring gas-phase H2O2 concentrations and for assessing the relative importance of various acidifying mechanisms under specific atmospheric conditions.
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.
1.1 This test method covers the determination of hydroperoxides, which include hydrogen peroxide (H2O2) and combined organic peroxides, in samples of atmospheric water by the method of horseradish peroxidase derivatization and fluorescence analysis of the derived dimer. ,
1.2 The range of applicable hydrogen peroxide concentrations was determined to be 0.6 - 176.0 x00D7; 10x2212;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 x00D7; 10x2212;6 M may be adequately obtained by calibration with hydrogen peroxide. , 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 H2O2 .
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 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 and health practices and determine the applicability of regulatory limitations prior to use.