利用复杂基质导入技术分析洗洁剂中芳香剂及过敏剂含量

For complex and difficult matrices the technique DMI (difficult matrix introduction)* is a powerful analytical tool. In the present contribution the DMI technique is applied for screening of washing powders. Pattern recognition, identification of unknown compounds as well as quantification of known ingredients can be done without any sample preparation. If it is also necessary to identify the fragrances in the perfumed products it can be done just in a single run during the normal screening because the DMI-GC-MS is also coupled to a sniffing port (‘PHASER’). At the end of the GC column the carrier gas flow is split into two flows. One flow is directed to the MS detector whereas the other is sent to the PHASER. Retention times for the two detection devices are hence virtually identical. For each injection of washing powder the micro-vial in the liner have to be changed to automated this step a LINEX (liner exchanger) is used.