建立肉制品中的铅、铬、镉、铝、锰、锡6种元素的电感耦合等离子体质谱分析方法。采用微波消解对样品进行前处理,消化后的样品经电感耦合等离子体质谱(inductively coupled plasma mass spectrometry,ICP-MS)检测,利用内标法进行定量分...建立肉制品中的铅、铬、镉、铝、锰、锡6种元素的电感耦合等离子体质谱分析方法。采用微波消解对样品进行前处理,消化后的样品经电感耦合等离子体质谱(inductively coupled plasma mass spectrometry,ICP-MS)检测,利用内标法进行定量分析。结果表明,6种元素线性范围为0.2μg/L^100μg/L,线性相关系数(R2)均大于0.995;检测限:铅0.02μg/L、铬0.03μg/L、镉0.02μg/L、铝0.01μg/L、锰0.04μg/L、锡0.10μg/L;方法加标回收率均在84.9%~104.2%之间;以重复性考察方法重现性,RSD(n=6)在2.71%~4.38%以内;以精密度考察方法稳定性,RSD(n=6)在2.72%~4.28%以内。此方法简单、快速、准确度高、灵敏度高,可以用于肉制品中6种元素的常规分析检测。展开更多
Totally 24 arbor tree species and 6 shrub species were measured on their absorption capacities to heavy metal Pb, Cd, Cr, and Hg by collecting and analyzing the leaves of trees along different streets in Harbin city i...Totally 24 arbor tree species and 6 shrub species were measured on their absorption capacities to heavy metal Pb, Cd, Cr, and Hg by collecting and analyzing the leaves of trees along different streets in Harbin city in Sept. to Oct. of 2003. The results showed that all the measured species had certain absorbency to the pollutants (Pb, Cd, Cr and Hg), but there existed significant difference in absorption capacity for different species to different pollutants. The measured tree species were classified into three categories by their absorption quantum of heavy metal pollutants. Among the species measured,Betula platyphylla, Ulmus pumila var.pendula, andPrunus persicaf.rubro-plena had high capacity in absorbing Pb;Populus xiahei, P. nigra var.Italica, P. alba x P. berolinensis andSalix matsudana had had high capacity in absorbing Cd;Phellodendron amurense, Syringa oblata, Salix matsudana, Pinus tabulaeformis var.mukdensis, Picea koraiensis, Prunus persica f.rubro-plena, P. triloba andAcer negundo, etc. had high capacity in absorption of Cr;Prunus triloba, Quercus mongolica, Salix matsudana, Sambucus williamsii, Pyrus ussuuriensis andSpiraea fritschiana were good at absorption of Hg. This study might offer scientific foundation for selection of urban afforestation species in different polluted conditions caused by heavy metals. Keywords Greening tree species - Heavy metal - Pollutants - Plumbum - Cadmium - Chromium - Mercury - Absorptivity CLC number S731.2 - X501 Document code A Foundation item: This study is financially supported by the Special Programme for Agriculture under Ministry of Chinese Science and Technology (No. 2002BA516A15-01).Biography: MU Li-qiang (1966-), female, Associate professor in Northeast Forestry University, Harbin 150040, P. R. China.Responsible editor: Zhu Hong展开更多
文摘建立肉制品中的铅、铬、镉、铝、锰、锡6种元素的电感耦合等离子体质谱分析方法。采用微波消解对样品进行前处理,消化后的样品经电感耦合等离子体质谱(inductively coupled plasma mass spectrometry,ICP-MS)检测,利用内标法进行定量分析。结果表明,6种元素线性范围为0.2μg/L^100μg/L,线性相关系数(R2)均大于0.995;检测限:铅0.02μg/L、铬0.03μg/L、镉0.02μg/L、铝0.01μg/L、锰0.04μg/L、锡0.10μg/L;方法加标回收率均在84.9%~104.2%之间;以重复性考察方法重现性,RSD(n=6)在2.71%~4.38%以内;以精密度考察方法稳定性,RSD(n=6)在2.72%~4.28%以内。此方法简单、快速、准确度高、灵敏度高,可以用于肉制品中6种元素的常规分析检测。
基金Financially supported by the Special Pro-gramme for Agriculture under Ministry of Chinese Science and Technology (No. 2002BA516A15-01).
文摘Totally 24 arbor tree species and 6 shrub species were measured on their absorption capacities to heavy metal Pb, Cd, Cr, and Hg by collecting and analyzing the leaves of trees along different streets in Harbin city in Sept. to Oct. of 2003. The results showed that all the measured species had certain absorbency to the pollutants (Pb, Cd, Cr and Hg), but there existed significant difference in absorption capacity for different species to different pollutants. The measured tree species were classified into three categories by their absorption quantum of heavy metal pollutants. Among the species measured,Betula platyphylla, Ulmus pumila var.pendula, andPrunus persicaf.rubro-plena had high capacity in absorbing Pb;Populus xiahei, P. nigra var.Italica, P. alba x P. berolinensis andSalix matsudana had had high capacity in absorbing Cd;Phellodendron amurense, Syringa oblata, Salix matsudana, Pinus tabulaeformis var.mukdensis, Picea koraiensis, Prunus persica f.rubro-plena, P. triloba andAcer negundo, etc. had high capacity in absorption of Cr;Prunus triloba, Quercus mongolica, Salix matsudana, Sambucus williamsii, Pyrus ussuuriensis andSpiraea fritschiana were good at absorption of Hg. This study might offer scientific foundation for selection of urban afforestation species in different polluted conditions caused by heavy metals. Keywords Greening tree species - Heavy metal - Pollutants - Plumbum - Cadmium - Chromium - Mercury - Absorptivity CLC number S731.2 - X501 Document code A Foundation item: This study is financially supported by the Special Programme for Agriculture under Ministry of Chinese Science and Technology (No. 2002BA516A15-01).Biography: MU Li-qiang (1966-), female, Associate professor in Northeast Forestry University, Harbin 150040, P. R. China.Responsible editor: Zhu Hong
