Home / Standards / GB/T 21816-2008 GB/T 21816-2008 Active Testing of chemicals - Inherent biodegradability - Zahn-Wellens test 化学品 固有生物降解性 赞恩-惠伦斯试验 Standard Type GBT ICS 13.020.40 CCS A80 Status 现行 Issue Date 2008-05-12 Implementation 2008-09-01 Responsible Dept 国家标准委 Drafting Unit N/A