王蓓 魏培培 遲志娟 王姣 母昌立
摘要為準確、可靠地檢測蔬菜中毒死蜱、三唑磷殘留,采用NY/T 761—2008《蔬菜和水果中有機磷、有機氯、擬除蟲菊酯和氨基甲酸酯類農藥多殘留檢測方法》,每7 d對同一質量濃度質控樣品平行測定2~3次,統計20組有效數據,通過計算平均值、標準偏差得出上下控制限、警告限和輔助線,繪制出由實驗室人員檢測技術水平、試劑、設備、分析方法和環境因素條件下的質量控制圖。該質量控制圖不僅可用于實際檢測過程中對檢測結果進行監控,還可為實驗室人員技術能力確認、實驗室間比對和能力驗證等分析質量控制行為提供判定依據。
關鍵詞質量控制圖;毒死蜱;三唑磷;殘留檢測
中圖分類號S481+.8文獻標識碼
A文章編號0517-6611(2017)10-0085-03
Application of Quality Control Chart to Chlorpyrifos,Triazophos Residue Determining in Vegetables
WANG Bei1,WEI Peipei2,CHI Zhijuan1 et al(1.The Supervision,Inspection & Testing Center of Agricultural Quality & Security,Taicang,Jiangsu 215400; 2.Danyang Municipal Agricultural Commission,Danyang,Jiangsu 212300)
AbstractThe effective and feasible method was discussed about ensuring the accurate detection result of chlorpyrifos,triazophos residue determining in vegetables.The current national standard pesticide multi residue screen methods for determination of organophosphorus pesticides,organochlorine pesticedes,pyrethroid pesticides and carbamate pesticides in vegetables and fruits(NY/T 761—2008) was used as a detection method.The same quality control sample was determined two or three times every week,and the effective data of the twenty groups were counted.By calculating the average value and standard deviation of the data,the control limit,alert limit and auxiliary line were obtained.With the limits,a quality control chart was outlined,by which the laboratory testing skills,reagents,equipment,analytical methods and environmental factors were taken into account.The chart was not only helpful in controlling the testing results,but also useful in the judgment for quality control activities,such as laboratory personnel technical ability confirmation,inter laboratory comparisons and capability validation.
Key wordsQuality control chart;Chlorpyrifos;Triazophos;Residue detection
毒死蜱和三唑磷均屬有機磷類殺蟲劑,是蔬菜上防治豆角螟、菜青蟲、小菜蛾、斜紋夜蛾等蟲害的主要藥品。但由于毒死蜱、三唑磷即使按照正確的方法和劑量使用,仍存在農殘超標的風險,不僅會威脅人體健康,還會影響農產品出口。國家農業部早在2013年發布2032號公告,規定2014年12月31日起,撤銷含三唑磷和毒死蜱產品在蔬菜上的使用登記,2016年12月31日起,全面禁止在蔬菜上使用[1-2]。自從開始實施新的食品安全法,出現了許多案例是因違規使用高毒農藥而被處罰的,一方面表明違規使用農藥已引起國家高度重視,并開始嚴厲打擊;另一方面也給檢測機構提出了更高的要求。
檢測機構的實驗室必須加強質量控制,不斷提高檢測水平,努力確保檢驗質量。……