木材与木制品生物碳含量计算方法 Calculation method of biogenic carbon content in wood and wood-based products  ICS  79.010 CCS  B 68   中华人民共和国国家标准 GB/T 44290—2024 2024-09-2 9发布 2025-04-0 1实施     国家市场监督管理总局 国家标准化管理委员会 发 布 目　　次 前言   ·····································································································   Ⅲ 1     范围   ··································································································   1 2     规范性引用文件   ······················································································   1 3     术语和定义   ···························································································   1 4     含碳率的确定   ·························································································   2      4.1     木材的含碳率   ····················································································   2      4.2     木制品的含碳率   ·················································································   2 5     木材和木制品绝干质量的确定   ·······································································   2      5.1     含水率的测定   ····················································································   2      5.2     质量的测定   ······················································································   2      5.3     木材和木制品绝干质量的确定   ···································································   2 6     生物碳含量及其转换为生物二氧化碳量的计算   ······················································   3      6.1     生物碳含量计算   ·················································································   3      6.2     生物二氧化碳量计算   ·············································································   3 7     报告   ··································································································   3 附录A （资料性）    计算示例   ···········································································   4 参考文献   ··································································································   5 GB/T 44290—2024     Ⅰ