1. 什么是定性？=仅判定成分是什么，不判定成分有多少                                                                                                                                                       2. 主成分指什么？=样品中有机类主要功能性主体成分，如：
1）改性PP材料或粒料中的PP成分
2）改性PC/ABS合金材料或粒料中的PC成分和ABS成分
3）聚氨酯涂料的PU成分等                                                                                                                                                                                
3.橡胶主成份推荐使用PGC-MS方法来测试较为便捷.                                                                                                                                                                                                                    
4.若客户对主成分定性有其他特殊要求，需先与实验室沟通确认，相应价格另议