Micro-solid-phase extraction of organochlorine pesticides using porous metal-organic framework MIL-101 as sorbent.
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%.
['Huang|Zhenzhen|Z|', 'Lee|Hian Kee|HK|']
D056831:Coordination Complexes D004784:Environmental Monitoring D008401:Gas Chromatography-Mass Spectrometry D006843:Hydrocarbons, Chlorinated D057230:Limit of Detection D000073396:Metal-Organic Frameworks D008670:Metals D010575:Pesticides D016062:Porosity D052616:Solid Phase Extraction D012997:Solvents D014867:Water D014874:Water Pollutants, Chemical
Micro-solid-phase extraction Organochlorine pesticides MIL-101 Gas chromatography–mass spectrometry