TAPPI T204 cm-17描述了一种测定木材和纸浆中溶剂溶性非挥发性物质含量的程序。可采用两种不同的溶剂系统，选择取决于每个特定实验室的安全性和再现性要求。二氯甲烷萃取的提取物含量较低。用1/3乙醇和2/3苯进行萃取，得到了可重复的结果，并包括一些额外的化合物。 由于本程序中使用的溶剂具有高度危险性，委员会正在研究一种新的程序，该程序将在日后使用替代溶剂取代该方法。

TAPPI T204 cm-17 describes a procedure for determining the amount of solvent-soluble, non-volatile material in wood and pulp. Two different solvent systems may be employed, the selection depending on the safety and reproducibility requirements of each particular laboratory. Dichloromethane extraction gives lower amounts of extractives. Extraction with 1/3 ethanol and 2/3 benzene gives reproducible results and includes some additional compounds. Due to the highly hazardous nature of the solvents used in this procedure, the committee is working on a new procedure that will replace this method at a later date utilizing alternative solvents.