... From Table 1- 5, it can be seen that various classes of pesticides have been determined by employing either LC-ESI-MS [11 1 -11 7, 12 1, 12 3] or LC-APCI-MS [11 8, 11 9, 12 2] The combination of SPE with ... ESI–PI–MS 5 10 11 6 GW off-line, 1L, SPE, ESI–NI–MS 5 10 11 5 SW off-line, 0.2L, SPE, ESI–PI–MS 20–30 11 7 Imidazolinone DW off-line, 2L, SPE, ESI–PI–MS about 11 3 Phenoxy acid GW off-line, 1L, SPE, ... 1L, SPE, ESI–NI–MS 10 –20 11 6 SW off-line, 1L, SPE, ESI–PI–MS 1 20 11 1 SW off-line, 0.2L, SPE, ESI–PI–MS 13 –40 11 2 Sulfonylurea GW off-line, 2L, SPE, ESI–NI–MS 5 10 11 4 Triazine, Phenylurea GW...