Development of a reference material for residues of chlorfluazuron and fluazuron in beef fat ACSL CRM 3 |
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Authors: | Paul Armishaw Jennifer Ward Roderick G Millar |
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Institution: | (1) Department of Administrative Services, Australian Government Analytical Laboratories, PO Box 83, Cottesloe, Western Australia, 6011, Australia |
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Abstract: | A beef fat sample was prepared and tested as candidate reference material for the pesticides chlorfluazuron (CFZ) and fluazuron (FZN). An analytical method employing HPLC with UV absorbance detection was developed for homogeneity and stability testing. The material consisted of beef fat spiked with acetone solutions of CFZ and FZN to achieve concentrations close to 1.0 mg/kg for each compound. The coefficients of variation of 7 analyses carried out to test between-jar homogeneity were 1.8% and 2.3% for FZN and CFZ, respectively. No instability of CFZ was detected over a three month period. The candidate reference material was found to be suitable for certification by interlaboratory testing. |
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