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中国农学通报

中国农学通报 ›› 2010, Vol. 26 ›› Issue (21): 71-74.

• 食品 营养 检测 安全 • 上一篇    下一篇

浙江省杨梅果实重金属含量水平及其质量安全评价

尚素微 吕爱华 祝新明 蒋步云   

  • 收稿日期:2010-05-24 修回日期:2010-06-21 出版日期:2010-11-05 发布日期:2010-11-05
  • 基金资助:

    浙江省林业厅一般项目

Concentration of Heavy Mental and Assessment on Quality and Safety in Myrica rubra Fruits in Zhejiang Province

  • Received:2010-05-24 Revised:2010-06-21 Online:2010-11-05 Published:2010-11-05

PDF (PC)

1055

摘要：

本研究拟从浙江省杨梅主产区采集杨梅果实样本进行测试分析，以期了解果实中铅、镉、砷和汞4种元素的污染水平，为杨梅的质量安全评价提供科学依据，也是进一步深入研究重金属污染途径及其进行人工控制的基础。对浙江省13个县（市、区）128个杨梅果实样品中铅、镉元素含量采用湿法消解，使用Thermo Solar S4型石墨炉原子吸收光谱仪进行测定；砷、汞元素含量采用压力消解罐消解，使用AFS-930型原子荧光光谱仪进行测定，并与国家标准进行比对和评价。结果显示：杨梅果实中汞、砷、铅和镉元素的检出率均达到100%，平均含量分别为0.0036、0.0290、0.1400和0.0120 mg/kg；除2个样品中铅含量超标外，98.43%的样品符合规定标准；杨梅果实中4种元素占各自标准值的比例分别为：铅（70%）、镉（40%）、汞（35.8%）、砷（5.8%）；不同产地的果实中汞、砷、铅和镉元素含量有一定差异；所测重金属的单因子污染指数排序为铅>镉>汞>砷，综合污染指数除了青田果实有轻污染以外（0.85

关键词: 区划因子模型, 区划因子模型, 气候区划指标, GIS, 春玉米

Abstract:

From this study, we try to find out the scientific support for the safety assessment of the Myrica rubra by investigating the pollution level of Pb, Cd, As and Hg 4 elements in Myrica rubra fruit, which was collected from the main Myrica rubra production areas in Zhejiang Province. And it is also the basis of studying the heavy metal pollution ways and the controlling methods. 128 samples of Myrica rubra Fruits in 13 counties of Zhejiang Province was assayed, evaluated and compared with national standard. We detect the content of Pb and Cd by using the Thermo Solar S4-type graphite furnace atomic absorption spectrometry after the wet digestion, detect As and Hg by using the AFS-930 type atomic fluorescence spectrometer after the pressure digestion. The results showed that the detection rates of Hg, As, Pb, Cd were 100% and average concentration of Hg, As, Pb, Cd was 0.0036, 0.0290, 0.1400, 0.0120 mg/kg respectively. The ratio of concentration and criterion of four elements in fruits was Pb（70%）, Cd（40%）, Hg（35.8%）, As（5.8%）respectively. There were some differences of concentration of Hg, As, Pb, Cd in different regions. The order of the single-factor pollution index of heavy metal determined was Pb>Cd>Hg>As, and the order of the integration pollution index of Myrica rubra Fruits was free from pollution while the polluted status by the heavy metal in Qingtian county was light.