1.1 该试验方法用于测定二氧化硅的电导率，电导率适用于表征橡胶级二氧化硅。 1.2 单位-- 以国际单位制表示的数值应视为标准。本标准中不包括其他计量单位。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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。 1.4 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====== 3.1 二氧化硅的电导率与吸附的水和沉淀的水合二氧化硅表面的羟基有关。由于蒸馏或去离子水的电导率- 电离水是非常低的，高电导率值与离子源有关，因为杂质。 3.2 将特定量的二氧化硅样品在蒸馏水或去离子水中煮沸。冷却至室温后，将悬浮液稀释至每体积4%质量（m/V），并将其温度调节至20 °C，带恒温器。使用电导率计和电导率池来测量电导率。

1.1 This test method is used to determine the electrical conductivity of silica and the electrical conductivity is suitable for characterizing rubber-grade silicas. 1.2 Units— The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard. 1.3 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. 1.4 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 ====== 3.1 The electrical conductivity of silica is related to both the adsorbed water and the hydroxyl groups on the surface of the precipitated, hydrated silica. Since the electrical conductivity of distilled or de-ionized water is very low, high electrical conductivity values are associated with ionic sources due to impurities. 3.2 A specific quantity of the silica sample is boiled in distilled or deionized water. After cooling to room temperature, the suspension is diluted to 4 % mass per volume (m/V) and its temperature is adjusted to 20 °C with a thermostat. The electrical conductivity is measured using a conductivity meter and a conductivity cell.