CONFIRMATION AND METHOD DEVELOPMENT FOR DECHLORINATED ATRAZINE FROM REDUCTIVE DEHALOGENATION OF ATRAZINE WITH FE-0

Batch aqueous experiments using fine-grained (100 mesh) zero-valent ir on (Fe-0) as an electron donor resulted in reductive dechlorination of atrazine (ATR, oro-4-ethylamino-6-isopropylamino-1,3,5-triazine). A m ass loss of atrazine and degradates determined by gas chromatography/m ass spectrometry (GC/MS) analysis indicated the presence of an unident ified degradation product. This degradate was identified as dechlorina ted atrazine (DCA, 2-ethylamino-4-isopropylamino-1,3,5-triazine) by hi gh-performance liquid chromatography/mass spectrometry/mass spectromet ry (HPLC/MS/MS) and GC/MS analyses. Identification of this compound in itiated the development of analytical methods using HPLC, GC/MS, and h igh-performance liquid chromatography/mass spectrometry (HPLC/MS) to s imultaneously quantify DCA and ATR. Coefficients of determination (r(2 )) for method calibration curves and method detection limits (MDL) for DCA were 0.999 and 0.15 ng/ml; 0.997 and 6.2 ng/ml; and 0.999 and 0.1 5 ng/ml for HPLC, GC/MS, and HPLC/MS, respectively. Recovery and stand ard deviation for DCA at the MDL concentration for each method were 98 .0+/-2.5; 130+/-3.9; and 110+/-5.6 for HPLC, GC/MS, and HPLC/MS, respe ctively. (C) 1998 Elsevier Science B.V. All rights reserved.