全自动消解仪测定土壤重金属含量的方法改进
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摘要
本法选用国家标准物质GBW07423、GBW07425、GBW07427为实验样品,测定其铅(Pb)、镉(Cd)、铜(Cu)、铬(Cr)四种元素的重金属含量。利用全自动消解仪对样品进行前处理,并进行自动稀释。在原有方法的基础上对消解过程中的加酸种类、加酸量、预加热、加热时间、稀释等进行了改进设置。实验表明,原方法变异系数范围为0.9~5.9,改进方法变异系数范围为0.7~4.7,在保证了准确度和精密度的基础上此法大大节省了批量土壤样品的消解时间,提高了消解效率;使样品受热更均匀,消解更完全;完全满足实验要求。
This national standard substances GBW07423,GBW07425,GBW07427 as experimental samples,to determine the lead(Pb),cadmium(Cd),copper(Cu)and chromium(Cr)four elements of heavy metal content. Using automatic instrument for samples pretreatment,and automatically diluted. On the basis of the original method to eliminate the plus acid type,and in the process of acid amount,pre heating,heating time and dilution is improved. Experiments show that the coefficient of variation of the range of 0.9-0.9 the original method,coefficient of variation range 0.7 4.7 improvement method,on the basis of ensures the accuracy and precision of this method greatly save the bulk soil sample digestion time,improve the efficiency of digestion;Make sample is heated more evenly,eliminate more completely;Fully meet the requirements.
This national standard substances GBW07423,GBW07425,GBW07427 as experimental samples,to determine the lead(Pb),cadmium(Cd),copper(Cu)and chromium(Cr)four elements of heavy metal content. Using automatic instrument for samples pretreatment,and automatically diluted. On the basis of the original method to eliminate the plus acid type,and in the process of acid amount,pre heating,heating time and dilution is improved. Experiments show that the coefficient of variation of the range of 0.9-0.9 the original method,coefficient of variation range 0.7 4.7 improvement method,on the basis of ensures the accuracy and precision of this method greatly save the bulk soil sample digestion time,improve the efficiency of digestion;Make sample is heated more evenly,eliminate more completely;Fully meet the requirements.
引文
[1]HJ491-2009,土壤-总铬的测定-火焰原子吸收分光光度法[S].HJ491-2009,soil-the determination of total chromium-flame atomic absorption spectrophotometry[S].
[2]GB/T17138-1997,土壤质量-铜、锌的测定-火焰原子吸收分光光度法[S].GB/T17138-1997,soil quality-determination of copper and zinc-flame atomic absorption spectrophotometry[S].
[3]GB/T17141-1997,土壤质量-铅、镉的测定-石墨炉原子吸收分光光度法[S].GB/T17141-1997,soil quality-determination of lead,cadmium-graphite furnace atomic absorption spectrophotometry[S].
[4]刘传娟,刘凤枝,蔡彦明,等.不同前处理方法-ICP-MS测定土壤中的重金属[J].分析实验室,2009(S1):91-94.Liu Chuanjuan,Liu Fengzhi,CAI Yanming,et al.Icp-ms different pretreatment methods for determination of heavy metals in soil[J].Journal of analysis laboratory,2009(S1):91to 94.
[5]蒋辉云,郭霞,汤根平.应用三种不同处理方法消解土壤的研究[J].四川环境,2013,32(4):19-22.Jiang Huiyun,Guo Xia,Tang Genping.Three different processing methods are applied to resolve the research of the soil[J].Journal of Sichuan environment,2013,32(4):19 to 22.
[6]刘静,王利红,王霞,等.全自动消解-石墨炉原子吸收光谱法测定土壤中Pb和Cd[J].山东科学,2013,26(5):18-21.Liu Jing,Wang Lihong,Wang Xia,et al.Automatic digestion-graphite furnace atomic absorption spectrometry determination of Pb and Cd in soil[J].Journal of Shandong science,2013,26(5):18 to 21.
[7]陈祖武,龚浩如,喻凤香,等.全自动消解石墨炉原子吸收光谱法测定土壤中的镉[J].作物研究,2016,30(1):81-85.Chen Zuwu,Gong Haoru,Yu Fengxiang,et al.Automatic eliminate graphite furnace atomic absorption spectrometry determination of Cd in soil[J].Journal of crop research,2016,30(1):81 to 85.
[8]赵雯玮,刘吉爱,朱红波,等.全自动消解仪在分析领域的发展与应用[J].西藏科技,2015(11):79-80.Zhao Wenwei,Liu Jiai,Zhu Hongbo,et al.Automatic digestion device in the field of analysis of the development and application of[J].Journal of Tibet science and technology,2015(11):79 to 80.
[9]龙加洪,谭菊,吴银菊,等.土壤重金属含量测定不同消解方法比较研究[J].中国环境监测,2013,29(1):128-131.Long Jiahong,Tan Ju,Wu Yinju,et al.The soil heavy metal content determination of different digestion methods comparison study[J].Journal of environmental monitoring in China,2013,29(1):128 to 131.
[2]GB/T17138-1997,土壤质量-铜、锌的测定-火焰原子吸收分光光度法[S].GB/T17138-1997,soil quality-determination of copper and zinc-flame atomic absorption spectrophotometry[S].
[3]GB/T17141-1997,土壤质量-铅、镉的测定-石墨炉原子吸收分光光度法[S].GB/T17141-1997,soil quality-determination of lead,cadmium-graphite furnace atomic absorption spectrophotometry[S].
[4]刘传娟,刘凤枝,蔡彦明,等.不同前处理方法-ICP-MS测定土壤中的重金属[J].分析实验室,2009(S1):91-94.Liu Chuanjuan,Liu Fengzhi,CAI Yanming,et al.Icp-ms different pretreatment methods for determination of heavy metals in soil[J].Journal of analysis laboratory,2009(S1):91to 94.
[5]蒋辉云,郭霞,汤根平.应用三种不同处理方法消解土壤的研究[J].四川环境,2013,32(4):19-22.Jiang Huiyun,Guo Xia,Tang Genping.Three different processing methods are applied to resolve the research of the soil[J].Journal of Sichuan environment,2013,32(4):19 to 22.
[6]刘静,王利红,王霞,等.全自动消解-石墨炉原子吸收光谱法测定土壤中Pb和Cd[J].山东科学,2013,26(5):18-21.Liu Jing,Wang Lihong,Wang Xia,et al.Automatic digestion-graphite furnace atomic absorption spectrometry determination of Pb and Cd in soil[J].Journal of Shandong science,2013,26(5):18 to 21.
[7]陈祖武,龚浩如,喻凤香,等.全自动消解石墨炉原子吸收光谱法测定土壤中的镉[J].作物研究,2016,30(1):81-85.Chen Zuwu,Gong Haoru,Yu Fengxiang,et al.Automatic eliminate graphite furnace atomic absorption spectrometry determination of Cd in soil[J].Journal of crop research,2016,30(1):81 to 85.
[8]赵雯玮,刘吉爱,朱红波,等.全自动消解仪在分析领域的发展与应用[J].西藏科技,2015(11):79-80.Zhao Wenwei,Liu Jiai,Zhu Hongbo,et al.Automatic digestion device in the field of analysis of the development and application of[J].Journal of Tibet science and technology,2015(11):79 to 80.
[9]龙加洪,谭菊,吴银菊,等.土壤重金属含量测定不同消解方法比较研究[J].中国环境监测,2013,29(1):128-131.Long Jiahong,Tan Ju,Wu Yinju,et al.The soil heavy metal content determination of different digestion methods comparison study[J].Journal of environmental monitoring in China,2013,29(1):128 to 131.