过氧化氢氧化甲基紫催化动力学光度法测定土壤和大米中痕量镉
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摘要
在1.0mol/L硫酸介质中,基于痕量镉催化过氧化氢氧化甲基紫发生褪色反应的原理,建立了测定痕量镉的催化分光光度检测方法,探索了影响催化反应检测方法的动力学条件。Cd~(2+)浓度在4.0×10~(-5)~3.2×10~(-4)μg/mL范围内,线性回归方程为y=0.166x+0.043 2,相关系数R~2为0.999 5,土壤及大米中Cd~(2+)的添加回收率分别为94.1%~97.2%、92.3%~94.0%。方法的精密度为3.38%~4.02%。该法能用于土壤及大米实际样本中痕量镉的检测。
In the 1.0 mol/L sulfuric acid,based on the principle of cadmium catalytic fading reaction with methyl violet by hydrogen peroxide,the catalytic spectrophotometry for determination of trace cadmium was established by exploration of the catalytic dynamicreaction conditions.The linearity of this method of Cd~(2+)concentrations were in ranging of4.0×10~(–5)~3.2×10~(–4)μg/mL was conducted with regression equation of y=0.166 x+0.043 2,correlation coefficient R~2 of 0.999 5.The recovery of this method in soil and rice were of 94.1%~97.2% and 92.3%~94.0% respectively.The precission of this method was conducted as of 3.38%~4.02%.This method can be applied to the trace cadmium determination in rice and soils samples in practic.
In the 1.0 mol/L sulfuric acid,based on the principle of cadmium catalytic fading reaction with methyl violet by hydrogen peroxide,the catalytic spectrophotometry for determination of trace cadmium was established by exploration of the catalytic dynamicreaction conditions.The linearity of this method of Cd~(2+)concentrations were in ranging of4.0×10~(–5)~3.2×10~(–4)μg/mL was conducted with regression equation of y=0.166 x+0.043 2,correlation coefficient R~2 of 0.999 5.The recovery of this method in soil and rice were of 94.1%~97.2% and 92.3%~94.0% respectively.The precission of this method was conducted as of 3.38%~4.02%.This method can be applied to the trace cadmium determination in rice and soils samples in practic.
引文
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[13]黄湘源,陈永晖,徐春秀.催化动力学光度法测定痕量镉的研究[J].南昌大学学报(理科版),2001,25(2):143-146.
[14]郭振良,马岩,王晓升.双波长双指示剂褪色光度法测定大米中的痕量镉[J].化学试剂,2017,39(4):391-394,398.
[15]龚兰新,王英波,高素云,等.阻抑动力学分光光度法测定痕量镉[J].光谱实验室,2013,30(2):573-575.
[16]赖冬梅,邓天龙.抗坏血酸-磺胺增效氢化物发生-原子荧光光谱法测定土壤中镉[J].分析化学,2010,38(4):542-546.
[2]欧阳燕玲,陈玲.大米中镉污染的现状分析及其危害[J].中国医药指南,2012,10(24):367-368.
[3]孙晓阳.土壤中重金属镉的原子分光光度法测定[J].农民致富之友,2015,6(4):85-86.
[4]郑世英,商学芳.土壤镉污染研究进展[J].安徽农学通报,2006,12(5):43-44.
[5]杜富芝.城乡交错区土壤镉污染研究[D].重庆:西南大学,2009:2-4.
[6]王士贺,王忠伟.石墨炉原子吸收光谱法测定土壤中铅、镉含量[J].理化检验(化学分册),2012,48(1):30-31.
[7]郭文录.火焰原子吸收光谱法测定色漆中镉的含量[J].现代涂料与涂装,2006,16(11):59-60.
[8]王菊,陈永红,孟宪伟,等.原子荧光光谱法测定金精矿中的砷汞镉铅铋[J].黄金,2015,36(8):68-71.
[9]谭广辉,周谨.催化分光光度法测定痕量镉[J].光谱实验室,2010,27(5):1893-1895.
[10]朱浩嘉,潘道东,顾愿愿,等.同位镀汞阳极溶出伏安法测定牛奶中镉、铅、铜[J].食品科学,2014,35(8):121-124.
[11]刘会,赵常志.噻二唑类导电聚合物膜修饰玻碳电极对镉的测定[J].青岛科技大学学报(自然科学版),2011,32(6):584-587,595.
[12]胡忠于,杨明平.催化光度法测定处理电镀废水中的微量镉[J].材料保护,2004,37(1):57-61,68.
[13]黄湘源,陈永晖,徐春秀.催化动力学光度法测定痕量镉的研究[J].南昌大学学报(理科版),2001,25(2):143-146.
[14]郭振良,马岩,王晓升.双波长双指示剂褪色光度法测定大米中的痕量镉[J].化学试剂,2017,39(4):391-394,398.
[15]龚兰新,王英波,高素云,等.阻抑动力学分光光度法测定痕量镉[J].光谱实验室,2013,30(2):573-575.
[16]赖冬梅,邓天龙.抗坏血酸-磺胺增效氢化物发生-原子荧光光谱法测定土壤中镉[J].分析化学,2010,38(4):542-546.