Occurrence of ectoparasiticides in Australian beef cattle feedlot wastes
Journal article, 2013
A liquid chromatography-tandem mass spectrometry (LC-MS/MS) method was developed for the simultaneous analysis of 6 ectoparasiticides - 2 synthetic pyrethroids (deltamethrin, cypermethrin) and 4 macrocyclic lactones (abamectin, doramectin, ivermectin and eprinomectin) in biosolids. The method was used to investigate the occurrence of these ectoparasiticides in beef cattle feedlot wastes in Australia from 5 commercial feedlot operations which employ varying waste management practices. Deltamethrin and cypermethrin were not detected in any of the samples while abamectin, ivermectin, doramectin and eprinomectin were detected in some of the samples with concentrations ranging from 1 to 36 mu g/kg dry weight (d.w.) freeze dried feedlot waste. Levels of macrocyclic lactones detected in the feedlot wastes varied and were dependent on sample type. The effect of seasonal variations and waste management practices were also investigated in this study.
Macrocyclic lactones
induced fluorometry derivatization
LC-MS/MS
performance liquid-chromatography
Analysis
insecticides
sheep feces
chemical-ionization
synthetic pyrethroids
Feedlot waste
solid-phase extraction
environmental-impac
Pyrethroids
pyrethroid
chromatography mass-spectrometry
fluorescence detection
Author
H. M. Coleman
University of New South Wales (UNSW)
T. Trinh
University of New South Wales (UNSW)
N. Le-Minh
University of New South Wales (UNSW)
M. Klein
University of New South Wales (UNSW)
D. J. Roser
University of New South Wales (UNSW)
R. W. Tucker
Feedlot Services Australia
RM Stuetz
University of New South Wales (UNSW)
Gregory Peters
Chalmers, Chemical and Biological Engineering, Chemical Environmental Science
Stuart Khan
University of New South Wales (UNSW)
Environmental Pollution
0269-7491 (ISSN) 1873-6424 (eISSN)
Vol. 174 265-272Subject Categories
Environmental Engineering
Earth and Related Environmental Sciences
DOI
10.1016/j.envpol.2012.11.018