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題名 | Determination of Paraquat Residues in Adzuki Beans (Vigna angularis)=紅豆(Vigna angularis)中巴拉刈殘留之樣品前處理與檢測 |
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作者 | 莊瑋臻; 林嘉威; 黃鎮華; 徐慈鴻; 林韶凱; | 書刊名 | 臺灣農藥科學 |
卷期 | 1 2016.12[民105.12] |
頁次 | 頁178-182 |
分類號 | 412.37 |
關鍵詞 | 紅豆; 液相層析串聯式質譜儀; 巴拉刈; 農藥殘留分析; Adzuki beans; LC-MS/MS; Paraquat; Residue analysis; |
語文 | 英文(English) |
英文摘要 | We developed a rapid and novel method to prepare and determine paraquat samples in adzuki beans using liquid chromatography -- tandem mass spectrometry (LC-MS/MS). The method is specifically used for adzuki beans since QuPPe-method (quick polar pesticides method) gave poor recovery of paraquat residues in adzuki beans. Sample preparation involves extraction with 1% formic acid/methanol, shaking of sample mixture, ultrasonication in a hot water bath with a temperature of 80°C, and centrifugation. The extracts were then passed through a 0.22-μm syringe filter into a plastic storage vial and subjected to LC-MS/MS analysis. The validity of the method was assessed by evaluating intraday and interday recoveries at low (0.05 mg/kg), medium (0.20 mg/kg), and high (0.50 mg/kg) levels of paraquat in adzuki beans. Recoveries ranged from 63.3% to 98.3%. The limit of quantification (LOQ) was 0.05 mg/kg, which may satisfy current regulatory needs in Taiwan. |
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