Home / Standards / GB/T 27653-2011 GB/T 27653-2011 Active Methods for analysis of quaternary ammonium compounds in preservative-treated wood - 2-Phase titration 防腐木材中季铵盐的分析方法 两相滴定法 Standard Type GBT ICS 79.010 CCS B71 Status 现行 Issue Date 2011-12-30 Implementation 2012-04-01 Responsible Dept 国家林草局 Drafting Unit 国家林草局