防护服. 化学品防护. 低蒸气压化学品通过材料累积渗透的测量

[中文适用范围]： 本文件描述了实验室测试方法，以确定个人防护装备 (PPE) 中使用的材料、封闭件和接缝对低蒸气压（25°C 时低于 133,322 Pa）和/或不溶性的固体或液体化学品渗透的抵抗力在水或其他常用作收集介质的液体中。 这些化学物质通常是农药制剂和其他混合物的一部分，无法使用其他渗透测量标准来测量。 该测试方法适用于场强和浓缩农药制剂以及其他混合物，其中活性成分是在常用液体和气体收集介质中具有低蒸气压和/或低溶解度的化学品。 该测试方法无意取代 ISO 6529、EN 16523-1 和 ASTM F739 等标准，这些标准测量挥发性或可溶于水或其他不与被测材料相互作用的液体的化学物质的渗透性。 已测试。 本文件不适用于测量在化学分析完成之前可能蒸发的挥发性化学物质。 污染程度取决于多种因素，例如暴露类型、应用技术和化学配方。 由于暴露水平可能有很大差异，因此该方法旨在评估不同持续时间的 PPE 材料的相对性能。 该方法旨在测量累积渗透。 该方法无法测量突破时间。 该测试方法不测量抗渗透性或抗降解性。 测试方法标准可用于评估新的 PPE 材料或产品标准要求处理（例如洗涤或模拟磨损）的材料。 应报告治疗详情。 [外文原描述]： ISO 19918 describes laboratory test methods to determine the resistance of materials, closures, and seams used in personal protective equipment (PPE) to permeation by solid or liquid chemicals with low vapour pressure (less than 133,322 Pa at 25 °C) and/or insolubility in water or other liquids commonly used as collection media. These chemicals that are often part of pesticide formulations and other mixtures cannot be measured using other standards for measuring permeation. This test method is suitable for field strength and concentrated pesticide formulations as well as other mixtures in which the active ingredient is a chemical with low vapour pressure and/or low solubility in commonly used liquid and gaseous collection media. This test method is not intended to be used in place of standards such as ISO 6529, EN 16523-1 and ASTM F739, which measure permeation of chemicals that are either volatile or soluble in water or other liquids that do not interact with the material being tested. ISO 19918 is not suitable for measurement of volatile chemicals that may evaporate before the chemical analysis is complete. The degree of contamination depends on numerous factors, such as type of exposure, application technique, and chemical formulation. As the level of exposure can vary considerably, this method is designed to rate relative performance of PPE materials for different durations. This method is designed to measure cumulative permeation. Breakthrough time cannot be measured by this method. This test method does not measure resistance to penetration or degradation. The test method standard may be used for the evaluation of PPE materials that are new or those for which the product standard requires treatment, such as laundering or simulated abrasion. Details of the treatment shall be reported.