三硅氧烷乙氧基化物(TSEOn)由于其与农药活性成分的显着协同作用而被广泛用作农业表面活性剂,一般来说,包括三个典型的端基为羟基(TSEOn-H),甲氧基(TSEOn-CH3),和乙酰氧基(TSEOn-COCH3),分别。然而,TSEOn同类物的潜在生态毒理学和内分泌干扰风险最近引起了越来越多的关注。最重要的是,关于农业生态系统中TSEOn浓度水平的研究有限。这项研究,通过改良的QuEChERS(快速,easy,便宜,有效,崎岖,并且安全)提取与超高效液相色谱-串联质谱(UPLC-MS/MS)耦合。TSEOn的方法检出限(MDL)和方法定量限(MQL)为0.003-0.07μg/kg和0.01-0.20μg/kg,分别。土壤中TSEOn低聚物的回收率为81%〜106%,相关标准偏差(RSD)<7%。这种新开发的UPLC-MS/MS方法具有高灵敏度和稳定性,使我们能够成功地追踪中国3个省和1市柑橘园土壤中TSEOn同源物的发生。在采样土壤中检测到的TSEOn-H低聚物的浓度范围为0.02至0.288μg/kg(干重)。TSEOn-H的同类物剖面在土壤中由TSEOn-H(n=6-8)主导。此外,土壤中TSEOn-H同源物(ΣTSEOn-H)的总浓度在0.03至1.49μg/kg的范围内。对不同柑橘园土壤中ΣTSEOn-H分布的比较表明,从浙江省收集的土壤样品中ΣTSEOn-H的含量较高。值得注意的是,在测试的土壤中未检测到TSEOn-CH3或TSEOn-COCH3低聚物。据我们所知,这是有关TSEOn同源物在农业土壤中的发生和分布的第一份报告。
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 μg/kg and 0.01-0.20 μg/kg, respectively. The recoveries for TSEOn
oligomers in soils ranged from 81 % ∼ 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 μg/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 (ΣTSEOn-H) in the soils were in the range of 0.03 to 1.49 μg/kg. A comparison of ΣTSEOn-H distribution among the different citrus orchard soils indicated a higher level of ΣTSEOn-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.