{"id":12633,"date":"2024-09-13T10:29:10","date_gmt":"2024-09-13T02:29:10","guid":{"rendered":"https:\/\/www.hencolin.com\/news\/%e6%b7%b1%e5%85%a5%e4%ba%86%e8%a7%a3dop%e5%92%8cpao%e6%aa%a2%e6%b8%ac%ef%bc%9a%e7%a9%ba%e6%b0%a3%e9%81%8e%e6%bf%be%e5%99%a8%e6%80%a7%e8%83%bd%e6%b8%ac%e8%a9%a6%e7%9a%84%e6%a0%b8%e5%bf%83%e6%8a%80\/"},"modified":"2025-03-21T13:34:43","modified_gmt":"2025-03-21T05:34:43","slug":"%e6%b7%b1%e5%85%a5%e4%ba%86%e8%a7%a3dop%e5%92%8cpao%e6%aa%a2%e6%b8%ac%ef%bc%9a%e7%a9%ba%e6%b0%a3%e9%81%8e%e6%bf%be%e5%99%a8%e6%80%a7%e8%83%bd%e6%b8%ac%e8%a9%a6%e7%9a%84%e6%a0%b8%e5%bf%83%e6%8a%80","status":"publish","type":"post","link":"https:\/\/www.hencolin.com\/en\/info-air-filter\/%e6%b7%b1%e5%85%a5%e4%ba%86%e8%a7%a3dop%e5%92%8cpao%e6%aa%a2%e6%b8%ac%ef%bc%9a%e7%a9%ba%e6%b0%a3%e9%81%8e%e6%bf%be%e5%99%a8%e6%80%a7%e8%83%bd%e6%b8%ac%e8%a9%a6%e7%9a%84%e6%a0%b8%e5%bf%83%e6%8a%80\/","title":{"rendered":"Learn more about DOP and PAO testing: the core technology of air filter performance testing"},"content":{"rendered":"\n

With the increasing global requirements for air quality standards and clean environments, DOP (Dioctyl Phthalate) and PAO (Polyalphaolefin) testing have become two key methods for performance testing of high-performance air filters (HEPA and ULPA). These inspections play an integral role in ensuring cleanroom environments in industries such as pharmaceutical, electronics manufacturing, and medical. This article will introduce you to the principles, applications, and importance of these two detection methods in industry and commerce.<\/p>\n\n\n\n

What are DOP and PAO tests?<\/h4>\n\n\n\n

Both DOP testing<\/strong> and PAO testing<\/strong> essentially use specific aerosols to test the efficiency of high-performance air filters. The core principle of both methods is to challenge the filter by generating aerosols of a specific concentration and particle size (0.3 microns is considered the most difficult particle size) and then measure the amount of aerosols before and after the filter to determine the filtration efficiency of the filter.<\/p>\n\n\n\n

DOP testing: a traditional but effective method<\/h4>\n\n\n\n

The DOP test<\/strong> is performed using an oily aerosol called dioctyl phthalate. This method has long been used in the nuclear and pharmaceutical industries because of its ability to accurately measure the removal efficiency of high-performance air filters.<\/p>\n\n\n\n