在更高层次的OECD 309模拟试验中改进化学持久性评估的参考物质的选择
H K Schofield1, C B Hughes1, D Scheerbaum2
1Ricardo, Harwell, Oxford OX11 0QR, UK.
Ecotoxicology and environmental safety
|December 4, 2025
概括
新的参考物质,咖啡因和2,4-D,提高了经合组织 (OECD) 309地表水测试的可靠性,以评估化学持久性. 这些改善了环境风险评估和监管数据质量.
科学领域:
- 环境化学环境化学
- 生态毒理学 生态毒理学
- 化学品风险评估 化学品风险评估
背景情况:
- 可靠的化学持久性评估对于环境风险评估至关重要.
- 对于表面水模拟试验,经合组织309试验准则 (TG) 中的变量可能会降低对结果的信心.
- 当前的参考物质可能无法充分反映注射剂的性能,限制了测试验证.
研究的目的:
- 识别和验证替代参考物质,以提高经合组织309测试的稳定性.
- 提高化学物质持久性评估在环境风险评估中的可靠性.
- 加强经合组织TG 309的有效性标准,并改进监管持久性评估.
主要方法:
- 使用多步骤过程来识别和验证替代参考物质.
- 32种候选物质使用经合组织301D TG方法进行了适合性和生物降解的选.
- 咖啡因和2,4-D在经合组织309 TG条件下在不同温度和度下进一步评估.
主要成果:
- 咖啡因显示较慢,一致的矿化,适合作为注射剂活性的积极控制.
- 2,4-D呈现出有限的降解,特别是在12°C,支持其作为负持久性基准的使用.
- 选择的物质显示出改善经合组织309测试和监管评估的潜力.
结论:
- 咖啡因和2,4-D是适合于经合组织309测试的替代参考物质.
- 采用这些物质可以提高经合组织TG 309.的有效性标准.
- 这些发现支持实验室间测试,以确认适用性并提高持久性数据的可比性.
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