Abstract
A simple and rapid method is described for the simultaneous determination of trace levels of 183 water contaminants. Water samples (1 L) were extracted with dichloromethane. After spiked with internal standards solution, the extracts were concentrated to 0.1 mL and analysed by GC/MS. The 183 of target chemicals were classified into three categories: the category 1, 2, and 3 include 72, 51, and 60 chemicals, respectively. Chemicals of each class were measured by GC/MS (SIM) with time-shared multi-ion detection mode.
Detection limits (S/N=3) were less than 10 pg for 129 chemicals. Recoveries were less than 40% for 5 chemicals (2.8%), 40-60% for 6 chemicals (3.3%) and 60-120% for 169 chemicals (92.3%), respectively. Relative standard deviations were less than 20% for most of chemicals (98%) .
