BAMBOO CHARCOAL AS SOLID-PHASE EXTRACTION ADSORBENT FOR THE DETERMINATION OF ORGANOPHOSPHORUS PESTICIDES IN WATER SAMPLES BY HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY

In this paper, bamboo charcoal was successfully developed for the solid-phase extraction adsorbent for the determination of six organophosphorus pesticides in water samples. After the bamboo charcoal was pretreated and packed in the solid-phase extraction cartridge, the organophosphorus pesticides in water samples were carried out the solid-phase extraction. To establish a perfect solid-phase extraction procedure, the experimental conditions including the eluent, eluent volume, pH of the sample, flow rate of the sample, and loading volume of the sample were all investigated. When 100mL water samples in the pH range of 6-7 were loaded with the flow rate of 2.5mL . min(-1) and then eluted with 10mL acetonitrile, the proposed extraction method was validated by the recovery, correlation coefficient (R-2), repeatability (RSD, n = 7) and LODs, which were 69.6-93.4%, 0.9982-0.9998, 2.9-5.6%, and 0.08-1.04 mu g . L-1, respectively. Furthermore, the analysis of the tap, snow, and river water samples demonstrated the feasibility of the proposed SPE method for real water samples. Based on the aforementioned factors, it could be concluded that bamboo charcoal was a good solid-phase extraction adsorbent, and this proposed solid-phase extraction method was suitable for the effective enrichment and determination of the organophosphorus pesticides in water samples.