摘要
通过了解杨梅果实中铅、镉、砷、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,本研究对浙江省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、0.0120mg/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<P综=1.26<1.71),其余杨梅均在非污染范围内。
In order to provide scientific basis for the quality and satety assessment of Myrica rubra by investigating the pollution levels of Pb,Cd,As and Hg in Myrica rubra fruit.128 samples of Myrica rubra Fruits in 13 counties of Zhejiang province was assayed,evaluated and compared with national standard.This study determined the content of Pb and Cd by using the Thermo Solar S4 graphite furnace atomic absorption spectrometry after wet digestion,the content of As and Hg by using the AFS-930 atomic fluorescence spectrometer after pressure digestion.And the content of four elements were compared and evaluated with the national standard.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 PbCdHgAs,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.
出处
《中国农学通报》
CSCD
北大核心
2010年第21期71-74,共4页
Chinese Agricultural Science Bulletin
基金
浙江省林业厅一般项目(2007A04)
浙江省省院合作林业科技项目(2007SY13)
关键词
浙江
杨梅
重金属
污染指数
质量安全
Zhejiang
Myrica rubra
heavy metal
pollution index
quality and satety
