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Rossum BV, Martijn A, Reijke AAD, Zeeman J, Åkerblom M, Bosshardt HP, Bushway RJ, Damme JCV, Darskus R, Kolleman J, Pavel K, Pilar-Hitos M, Pouwelse A, Sãnchez-Rasero F, Stewart T, Suter R, Tengler H, Winsauer K, Wisson M. High Performance Liquid Chromatographic Analysis of Diflubenzuron and Its Formulations: Collaborative Study. J AOAC Int 2020. [DOI: 10.1093/jaoac/66.2.312] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
Diflubenzuron 90% pre-concentrate and its 25% water-dispersible powder were analyzed by a high performance liquid chromatographic method. Six samples were extracted with 1,4-dioxane, linuron was added as internal standard, and diflubenzuron was separated on a 25 cm × 4.6 mm column packed with Zorbax BP-C8 with acetonitrile-water-l,4-dioxane (450 + 450 + 100) at 1.3 mL/min and monitored at 254 nm. Results were obtained from 17 laboratories. Within-laboratory repeatability was 0.6% for both the pre-concentrate and the water-dispersible powder samples and the reproducibility was 1.2%. The method has been adopted as a full CIPAC method and was adopted official first action by AOAC.
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Affiliation(s)
| | | | | | - Jakob Zeeman
- Duphar B.V., PO Box 2,1380 AA Weesp, The Netherlands
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