在中国的果园土壤中发生和分布的三甲乙酸盐:分析挑战
Simeng Li1, Ning Yue1, Minjie Li2
1Key Laboratory of Agro-product Quality and Safety, Institute of Quality Standards & Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
The Science of the total environment
|February 7, 2024
概括
这项研究在中国果园土壤中检测到三素乙氧酸盐 (TSEOn),发现TSEOn-H寡合体存在,特别是在江省. 这项研究是首次报告TSEOn在农业土壤中的发生和分布.
科学领域:
- 环境化学环境化学
- 农业化学 农业化学
- 分析化学 分析化学
背景情况:
- 三素乙氧酸盐 (TSEOn) 是常见的农业表面活性剂,但它们在农业生态系统中的环境风险和度未得到充分研究.
- TSEOn具有各种末端组 (基,甲基,乙基),每一个都可能表现出不同的环境行为和毒性.
- 对TSEOn的生态毒理学和内分泌干扰潜力的担忧迫使对其在环境中的存在进行研究.
研究的目的:
- 开发和验证一种敏感的分析方法,用于在农业土壤中同时检测多个TSEOn寡合体.
- 在中国不同地区的果园土壤中调查TSEOn同源的发生和分布.
- 建立农业生态系统中TSEOn水平的基线数据,重点关注基终结三素乙氧酸盐 (TSEOn-H).
主要方法:
- 采用经过修改的QuEChERS提取技术进行样本制备.
- 超高性能液态染色学与并联质谱学 (UPLC-MS/MS) 结合,用于对39个TSEOn寡合体进行敏感和同时分析.
- 方法验证包括评估检测极限 (MDL),量化极限 (MQL) 和土壤矩阵中的回收率.
主要成果:
- 开发的UPLC-MS/MS方法表现出高灵敏度 (MDLs:0.003-0.07μg/kg) 和稳定性,恢复率很好 (81%-106%).
- 在中国三个省份和一个市镇的果园土壤中检测到TSEOn-H寡合物,其度在0.02至0.288μg/kg (干重) 之间.
- 在TSEOn-H的同源型号中,以6-8个乙氧单元 (n=6-8) 的寡合体占主导地位,TSEOn-H总度 (ΣTSEOn-H) 从0.03到1.49μg/kg不等,在江省观察到的水平更高. 没有检测到甲基和乙基终结的TSEOn.
结论:
- 本研究提出了关于TSEOn同源在农业土壤中的发生和分布的第一份报告,特别是中国果园的情况.
- 这些发现凸显了TSEOn-H在这些土壤中的流行程度,其度在区域内有所不同.
- 已建立的分析方法为未来对环境样本中TSEOn和相关化合物的监测提供了强大的工具.
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