用于确定通过从细分酚醛模塑材料的样品中煮沸丙酮可以提取的物质量的重量法的规范。萃取液在受控条件下干燥，通过称量确定残留物质量。丙酮可溶物质（表观树脂含量）的量以原始测试部分的质量百分比表示

Specification of a gravimetric method for the determination of the amount of matter that can be extracted by boiling acetone from a sample of finely divided phenolic moulding material. The extract is dried under controlled conditions and the mass of residue determined by weighing. The amount of acetone soluble matter (apparent resin content) is expressed as percentage by mass of the original test portion.