“…To validate this method, water samples were fortified in triplicate at two different levels: at the LOQ (0.1 ppb) and at 10 times the LOQ (1.0 ppb). A typical (32), 411 (100) imazaquin (5) 311 199 (15), 267 (21), 312 (100) thifensulfuron methyl (6) 387 141 (36), 167 (34), 388 (100) metsulfuron methyl (7) 381 141 (34), 167 (43), 382 (100) sulfometuron methyl (8) 364 150 (91), 199 (19), 365 (100) chlorsulfuron (9) 357 141 (65), 167 (21), 358 (100) triasulfuron (10) 401 141 (31), 167 (11), 402 (100) bensulfuron methyl (11) 410 149 (49), 182 (34), 411 (100) prosulfuron (12) 419 141 (25), 167 (7), 420 (100) halosulfuron methyl (13) 434 182 (50), 403 (19), 435 (100) chlorimuron ethyl (14) 414 186 (37), 213 (6), 415 (100) triflusulfuron methyl (15) 492 264 (26), 461 (6), 493 (100) primisulfuron methyl (16) 468 199 (17), 254 (40), 469 (100) set of validation samples for each matrix consisted of two control samples, six fortified samples (three at each of two levels), and three or more solvent blanks (10:90 or 20:80 acetonitrile/water).…”