Embedment of Ag(I)-organic frameworks into silica gels for microextraction of polybrominated diphenyl ethers in soils
作者： Chao-Yan Zhang , Zeng-Guang Yan , You-Ya Zhou , Lin Wang , Ya-Bo Xie
DOI: 10.1016/J.CHROMA.2015.01.027
关键词: Polybrominated diphenyl ethers 、 Extraction (chemistry) 、 Chromatography 、 Detection limit 、 Soil water 、 Chemistry 、 Purified water 、 Water volume
摘要: Abstract Three Ag(I)-organic frameworks, [Ag5(pydc)2(CN)]n, {[Ag4(pydc)2]CH3CN}n, and [Ag(4,4′-bpy)NO3]n, were synthesized embedded into silica gels to form metal-organic-framework (MOF)-embedded for the microextraction of polybrominated diphenyl ethers (PBDEs) in soils. Despite great differences structures organic ligands, all three frameworks found effectively accumulate concentrate PBDEs from sample solutions prepared with contaminated soil purified water, indicating important roles Ag centers PBDE extraction. Under optimal experimental conditions (MOF mass, water volume, temperature, extraction time, back-extraction time) solutions, detection limits seven (BDE-28, 47, 99, 100, 153, 154, 183) ranged 0.01 2.6 ng g−1 0.20–0.64 ng g−1 0.60–3.08 ng g−1 [Ag(4,4′-bpy)NO3]n. The reproducibilities methods satisfactory relative standard deviations (RSDs) range 2.2–9.6%, 5.3–10.4%, 6.9–9.4% respectively. use was validated using both certified reference soils field-contaminated soils, proposed are recommended as rapid environmentally friendly alternatives determination
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