GB/T 40611-2021塑料 海水沙质沉积物界面非漂浮塑料材料最终需氧生物分解能力的测定 通过测定密闭呼吸计内耗氧量的方法Plastics. Determination of aerobic biodegradation of non-floating plastic materials in a seawater/ sandy sediment interface. Method by measuring the oxygen demand in closed respirometer