1.范围1。1本标准适用于空气中二氧化硫浓度的测量。1.2本标准规定了以West Gaeke法为基础的副玫瑰苯胺比色法，作为测量25至1000？范围内二氧化硫的参考方法？G25岁的m-3？C和101.3千帕。笔记本标准中提及的所有浓度均基于25°C的温度？C和101.3 kPa的大气压力，除非另有说明。1.3本标准承认有几种仪器方法可用于二氧化硫的连续监测。本标准附录给出了一些仪器技术的简要概述。对于这种污染物的常规分析，这些方法可能优于参考方法。然而，任何此类方法应首先证明等同于参考方法，或应为所有相关方共同接受。 注:有关等效性测试的更多信息，请参阅参考书目第1项。

1. Scope1.1This Standard applies to the measurement of the concentration of sulphur dioxide in air.1.2This Standard sets forth the Pararosaniline Colorimetric Procedure based on the West-Gaeke Method as the reference method for the measurement of sulphur dioxide in the range 25 to 1000?g?m-3 at 25?C and 101.3 kPa.Note. All concentrations referred to throughout this Standard are based on a temperature of 25?C and an atmospheric pressure of 101.3 kPa unless otherwise stated.1.3This Standard recognizes that several instrumental methods are available for the continuous monitoring of sulphur dioxide. Brief outlines of some of the instrumental techniques are given as Appe ndices to this Standard. These methods may be preferred over the reference method for the routine analysis of this pollutant. However, any such method shall first be shown to be equivalent to the reference method, or shall be mutually acceptable to all interested parties.Note: For additional information on equivalence testing, refer to Item 1 of the Bibliography.