Occurrence and distribution of trisiloxane ethoxylates in citrus orchard soils in China: Analytical challenges

文献类型： 外文期刊

第一作者： Li, Simeng

作者： Li, Simeng;Yue, Ning;Li, Minjie;Li, Xiaohui;Li, Bowen;Wang, Hongping;Wang, Jing;Jin, Fen;Li, Minjie

作者机构：

关键词： Trisiloxane ethoxylates; UPLC-MS/MS; Oligomers; Citrus orchard soils; Congener profiles

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：9.8； 五年影响因子：9.6 ）

ISSN： 0048-9697

年卷期： 2024 年 918 卷

页码：

收录情况： SCI

摘要： Trisiloxane ethoxylates (TSEOn) are widely used as agricultural surfactants due to their significant synergism with the active ingredients of pesticides, generally, including three typical end groups which are hydroxyl (TSEOn-H), methoxy (TSEOn-CH3), and acetoxy (TSEOn-COCH3), respectively. However, the potential ecotoxicological and endocrine-disrupting risks of TSEOn congeners have recently attracted ever-growing concern. Above all, there is limited research on the concentration levels of TSEOn in agroecosystems. This study, simultaneous analysis of 39 TSEOn oligomers in citrus orchard soils in China was implemented by the modified QuEChERS (quick, easy, cheap, effective, rugged, and safe) extraction coupled with ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). The method detection limits (MDLs) and the method quantification limits (MQLs) for TSEOn were 0.003-0.07 mu g/kg and 0.01-0.20 mu g/kg, respectively. The recoveries for TSEOn oligomers in soils ranged from 81 % similar to 106 % with related standard deviations (RSDs) < 7 %. This newly developed UPLC-MS/MS method with high sensitivity and stability allows us to successfully trace the occurrence of TSEOn congeners in the citrus orchard soils from 3 provinces and 1 municipality in China. The detected concentrations of TSEOn-H oligomers in the sampled soils ranged from 0.02 to 0.288 mu g/kg (dry weight). The congener profiles of TSEOn-H were dominated by TSEOn-H (n = 6- 8) in the soils. Additionally, the total concentrations of TSEOn-H congeners (Sigma TSEOn-H) in the soils were in the range of 0.03 to 1.49 mu g/kg. A comparison of Sigma TSEOn-H distribution among the different citrus orchard soils indicated a higher level of Sigma TSEOn-H in the soil samples collected from Zhejiang Province. Notably, TSEOn-CH3 or TSEOn-COCH3 oligomers were not detected in the tested soils. To the best of our knowledge, this is the first report on the occurrence and distribution of TSEOn congeners in agricultural soils.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序