| 萃取光度法测定树叶上的铅含量 |
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| 引用本文： | 卢新生,张海玲,苟如虎,刘伯渠,王亚玲. 萃取光度法测定树叶上的铅含量[J]. 安徽农业科学, 2011, 0(13): 7849-7850,7853 |
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| 作者姓名： | 卢新生 张海玲 苟如虎 刘伯渠 王亚玲 |
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| 作者单位： | 广西水产研究所罗氏沼虾良种场; |
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| 基金项目： | 广西青年基金项目(2010GXNSFB013037); 广西社会公益研究项目(2060302GXIF-2009-09) |
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| 摘 要： | [目的]用萃取光度法测定树叶上铅的含量。[方法]将树叶浸在硝酸溶液中,将附着于表面的铅溶解。在pH为8.0~9.0的条件下,使铅与双硫腙形成红色配合物,用二氯甲烷萃取,然后测定该配合物的吸光度,通过标准曲线找出试液的含铅量。[结果]试验测得公路附近树叶样品含铅量为2.10×10-3g/L,离公路较远的树叶样品含铅量为1.26×10-3g/L。[结论]该研究方法灵敏,操作简单,专一性强,符合大气污染分析的技术要求。
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| 关 键 词： | 标准曲线 吸光度 溶液 |
Determination of Pb Concentrations from Plant Leaves by Extraction-Luminosity Method |
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| LU Xin-sheng et al. Determination of Pb Concentrations from Plant Leaves by Extraction-Luminosity Method[J]. Journal of Anhui Agricultural Sciences, 2011, 0(13): 7849-7850,7853 |
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| Authors: | LU Xin-sheng et al |
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| Affiliation: | LU Xin-sheng et al(Department of Chemistry and Life Sciences,Gansu Normal University for Nationalities,Hezuo,Gansu 747000) |
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| Abstract: | [Objective]The research aimed to determine Pb concentrations on plant leaves by extraction-luminosity methods.[Method]Samples of plant leaves were soaked in the nitric acid solution,and the Pb on it was dissoluted.At pH of 8.0-9.0,Pb and diphenyl thiocarbazone reacted into red composition.Extracted with dichloromethane,and the absorbency of this red composition was determined.Then the concentration of Pb was figured out through specification curve.[Result]The results showed that Pb concentration of leave sa... |
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| Keywords: | Specification curve Extinction Solution |
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