| 超声分离法测定植物及土壤中游离铅 |
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| 引用本文： | 蔡卓,卢登峰,张娴,杜良伟,梁信源,莫利书,黄富嵘.超声分离法测定植物及土壤中游离铅[J].实验室研究与探索,2011,30(3). |
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| 作者姓名： | 蔡卓 卢登峰 张娴 杜良伟 梁信源 莫利书 黄富嵘 |
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| 作者单位： | 广西大学化学化工学院,广西,南宁,530004 |
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| 基金项目： | 广西自然科学基金，广西大学实验设备处资助项目 |
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| 摘 要： | 提出以超声提取,单扫描极谱法测定植物和土壤中游离态铅的方法.实验发现,在酸性条件下,超声波能有效地分离提取豆芽和土壤样品中的游离铅,并用单扫描极谱法进行测定.分别以去离子水、2 mol/L HNO3、4 mol/L HNO3为溶液考察了超声介质及超声时间对铅提取量的影响.结果表明:豆芽和土壤样品在硝酸介质中分别超声80、50 min即达到饱和提取量,而在去离子水介质中超声的分离作用不大.与酸浸泡法相比,超声提取法具有更为显著的分离效果,表明超声促进了氢离子置换样品中铅离子的反应.该方法具有化学试剂消耗少、分析速度快、对环境污染小等优点,将其应用于实际样品的测定,结果满意.
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| 关 键 词： | 超声分离 铅 豆芽 土壤 单扫描极谱法 |
The Determination of Free Lead in Bean Sprout and Soil with Ultrasonic Extraction |
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| CAI Zhuo,LU Deng-feng,ZHANG Xian,DU Liang-wei,LIANG Xin-yuan,MO Li-shu,HUANG Fu-rong.The Determination of Free Lead in Bean Sprout and Soil with Ultrasonic Extraction[J].Laboratory Research and Exploration,2011,30(3). |
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| Authors: | CAI Zhuo LU Deng-feng ZHANG Xian DU Liang-wei LIANG Xin-yuan MO Li-shu HUANG Fu-rong |
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| Institution: | CAI Zhuo,LU Deng-feng,ZHANG Xian,DU Liang-wei,LIANG Xin-yuan,MO Li-shu,HUANG Fu-rong(College of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China) |
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| Abstract: | A new method for determination of trace free lead in plant and soil by single sweep polarography with ultrasonic extraction was described.The results show that free lead in bean sprout and soil could be separated effectively by ultrasonic extraction in acidic solution and measured using single sweep polarography.The effects of ultrasonic medium and ultrasonic time on the extract amount of lead were investigated in deionized water,2 mol/L HNO3,and 4 mol/LHNO3 respectively.The results show that the extraction... |
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| Keywords: | ultrasonic separation lead bean sprout soil single sweep polarography |
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