Active Sampling Device for Determining Pollutants in Surface and Pore Water - the In Situ Sampler for Biphasic Water Monitoring.

ABSTRACT: 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.

SUBMITTER: Supowit SD 

PROVIDER: S-EPMC4764808 | biostudies-other | 2016 Feb

REPOSITORIES: biostudies-other