Active Sampling Device for Determining Pollutants in Surface and Pore Water - the In Situ Sampler for Biphasic Water Monitoring.
Active Sampling Device for Determining Pollutants in Surface and Pore Water - the In Situ Sampler for Biphasic Water Monitoring.
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DOI：
10.1038/srep21886
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发表时间：
2016-02-24
影响因子：
4.6
通讯作者：
Halden RU
中科院分区：
文献类型：
--
作者：
Supowit SD;Roll IB;Dang VD;Kroll KJ;Denslow ND;Halden RU
我们设计并评估了一种主动采样设备，将一系列据称会导致蜜蜂蜂群崩溃障碍的杀虫剂作为分析目标。使用低流量的多通道泵将水输送到一系列固相萃取柱，实现了散装水和孔隙水的同时采样。使用液体或气相色谱分离分析物，并使用串联质谱仪(MS/MS)进行分析。在标称浓度为0.1、1和10 ng/L的水中，氟虫腈和降解物的回收率在77 ± 12到110 ± 18%之间。方法检出限为0.040.5~0.8 ng/L，地表水和孔隙水中总纤溶物的浓度范围分别为9.9 ± 4.6~18.1 ± 4.6 ng/L和9.1 ± 3.0~12.6 ± 2.1 ng/L。检测到的浓度与传统的、更费力的技术测定的浓度在统计学上没有区别(p >；三种最丰富的纤溶物的 0.2)。除了为两个阶段同时提供时间平均采样能力和每升皮克的MDL外，新的方法通过原位固相萃取消除了对水和沉积物输送的需要。
We designed and evaluated an active sampling device, using as analytical targets a family of pesticides purported to contribute to honeybee colony collapse disorder. Simultaneous sampling of bulk water and pore water was accomplished using a low-flow, multi-channel pump to deliver water to an array of solid-phase extraction cartridges. Analytes were separated using either liquid or gas chromatography, and analysis was performed using tandem mass spectrometry (MS/MS). Achieved recoveries of fipronil and degradates in water spiked to nominal concentrations of 0.1, 1, and 10 ng/L ranged from 77 ± 12 to 110 ± 18%. Method detection limits (MDLs) were as low as 0.040–0.8 ng/L. Extraction and quantitation of total fiproles at a wastewater-receiving wetland yielded concentrations in surface water and pore water ranging from 9.9 ± 4.6 to 18.1 ± 4.6 ng/L and 9.1 ± 3.0 to 12.6 ± 2.1 ng/L, respectively. Detected concentrations were statistically indistinguishable from those determined by conventional, more laborious techniques (p > 0.2 for the three most abundant fiproles). Aside from offering time-averaged sampling capabilities for two phases simultaneously with picogram-per-liter MDLs, the novel methodology eliminates the need for water and sediment transport via in situ solid phase extraction.