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杭州市西湖区域茶叶和桂花叶中OCPs污染特征

Keywords: OCPs,茶叶,桂花叶,污染特征

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Abstract:

利用气相色谱串联质谱(GC-MS/MS)内标法对夏、冬季杭州西湖区域8个点位的茶叶和桂花叶中10种有机氯农药的含量进行了分析测定。结果表明:杭州西湖区域夏季茶叶ΣOCPs含量范围为0.80~1.21μg·kg-1,平均值为1.01μg·kg-1;冬季ΣOCPs含量范围为1.37~2.85μg·kg-1,平均值为1.99μg·kg-1。夏季桂花叶ΣOCPs含量范围为1.45~13.34μg·kg-1,平均值为5.97μg·kg-1;冬季ΣOCPs含量范围为2.08~8.69μg·kg-1,平均值为4.58μg·kg-1。茶叶和桂花叶中OCPs污染主要来源于环境中早期的残留。OCPs的含量随着季节变化,茶叶中冬季OCPs的含量高于夏季的含量,而桂花叶中夏季高于冬季,表明茶叶中OCPs的变化可用于监测西湖区域大气中OCPs的季节变化规律,而桂花叶片适用于监测连续数年该区域大气中OCPs的污染情况。

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