کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1199265 | 1493525 | 2015 | 8 صفحه PDF | دانلود رایگان |
• A new application of MIL-101 for micro-solid-phase extraction was investigated.
• The extraction towards organochlorine pesticides was optimized.
• Efficient enrichment was achieved due to the porous structure of MIL-101.
• The feasibility of analysis of real water samples was demonstrated.
In this study, a metal-organic framework material, MIL-101, used as a micro-solid-phase extraction (μ-SPE) sorbent for efficient enrichment of five organochlorine pesticides (OCPs), including α-HCH, Aldrin, α-Chlordane, Dieldrin and p,p′-DDD from water samples, followed by gas chromatography–mass spectrometry, is reported. This study demonstrated a new application of MIL-101 using μ-SPE, an advantage of the latter being its ability to process complex aqueous matrices, due to the protection of the sorbent afforded by the hollow fiber membrane bag. Key factors affecting extraction efficiency were studied, including elution solvent, extraction and desorption time. Under the optimal extraction conditions, the calibration plots were linear from 0.05 to 50 ng/mL for α-HCH and p,p′-DDD, and 0.1 to 50 ng/mL for the other three analytes. The limits of detection were between 0.0025 and 0.016 ng/mL. The relative recoveries of the OCPs spiked into real water samples (at 5 ng/mL of each analyte) ranged from 87.6 to 98.6% with relative standard deviations of <10%.
Journal: Journal of Chromatography A - Volume 1401, 3 July 2015, Pages 9–16