Multiwalled Carbon Nanotubes as Matrix Solid-Phase Dispersion Extraction Absorbents To Determine 31 Pesticides in Agriculture Samples by Gas Chromatography-Mass Spectrometry

作者：Fang Guozhen; Min Guang; He Jinxing; Zhang Chao; Qian Kun; Wang Shuo^*

来源：Journal of Agricultural and Food Chemistry, 2009, 57(8): 3040-3045.

DOI：10.1021/jf803913q

• Multiresidue
• pesticides
• multiwalled carbon nanotubes
• matrix solid-phase dispersion extraction
• gas chromatography-mass spectrometry
• agriculture sample

A matrix solid-phase dispersion extraction (MSPDE) method was developed to extract 31 pesticides from agriculture samples using multiwalled carbon nanotubes (MWCNTs) as adsorbent prior to gas chromatography-mass spectrometry (GC-MS) determination. The comparisons of MWCNTs with C(18) and diatomite were studied in the MSPD procedure. The results showed that the extracts obtained by using MWCNTs were cleaner than those obtained by using C18 and diatomite. Using the developed method, recoveries ranged from 74.2 to 104.2% with relative standard deviations (RSD) ranging from 3.1 to 8.8% for the apple matrix, and 71.5-113.3% with RSD ranging from 3.2 to 9.7% for the potato matrix. The limits of detection (LODs), calculated as 3 times the background noise, ranged from 0.1 to 3.1 mu g kg(-1) for the apple matrix and 0.1 to 4.0 pg kg(-1) for the potato matrix. The proposed MSPDE method was used to analyze real samples obtained in a local market, the results were approximation to those obtained using accelerated solvent extraction (ASE) method, and prometryn, isocarbophos and methidathion were detected at levels below the maximum residue limits (MRLs) allowed by the Chinese Government.

• 出版日期2009-4-22
• 单位天津科技大学