镉(Ⅱ)-碘化钾-VBB体系的共振散射光谱及分析应用
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摘要
镉是一种重金属污染物,它能通过食物链进入生物体内,从而影响人类健康,因此对环境中镉的检测引起了人们的广泛关注。在p H=4的弱酸性条件下,过量I~-与Cd~(2+)形成[CdI4]2~-,在疏水作用力和静电引力共同作用下进一步与维多利亚蓝B(VBB)形成三元离子缔合物[VBB]_2[CdI_4],该体系的共振瑞利散射(RRS)、二级散射(SOS)和倍频散射(FDS)信号均有明显增强,最大散射波长分别位于623 nm(RRS)、696 nm(SOS)、343 nm(FDS)处。通过实验条件优化,ΔI与Cd~(2+)浓度在一定范围内呈良好线性关系,且检出限分别为0.28μg/L(RRS)、0.17μg/L(SOS)、0.39μg/L(FDS)。将此方法用于实验室废水、涪江河水和自来水中Cd~(2+)的测定,回收率在95.1%~107.3%之间,效果令人满意。同时还对反应机理进行了初步讨论。
Cadmium is a heavy metal pollutant that can be stored in organisms through the food chain, thus affecting human health. Therefore, the detection of cadmium in the environment has aroused wide concern. In weak acidic environment of pH4, excessive I-can react with Cd~(2+)to form [CdI_4]2~-, it further reacts with Victoria Blue B(VBB) to form ternary ion association complex [VBB]_2[CdI_4] because of hydrophobic force and electrostatic attraction. In addition, resonance Rayleigh scattering(RRS), secondary scattering(SOS) and frequency-doubling scattering(FDS) signals of the system have been enhanced obviously, and the biggest scattering wavelength located at 623 nm(RRS), 696 nm(SOS) and 343 nm(FDS), respectively. Under the optimum experimental conditions, enhanced peak signal(ΔI) has a good linear relation with the concentration of Cd~(2+)within a certain range. The detection limits were 0.28 μg/L(RRS), 0.17 μg/L(SOS) and 0.39 μg/L(FDS), respectively. This method has been used for the determination of Cd~(2+)in laboratory wastewater, Fujiang river water and tap water samples with recoveries of 95.1%~107.3%. Moreover, the reaction mechanism has also been discussed preliminarily.
Cadmium is a heavy metal pollutant that can be stored in organisms through the food chain, thus affecting human health. Therefore, the detection of cadmium in the environment has aroused wide concern. In weak acidic environment of pH4, excessive I-can react with Cd~(2+)to form [CdI_4]2~-, it further reacts with Victoria Blue B(VBB) to form ternary ion association complex [VBB]_2[CdI_4] because of hydrophobic force and electrostatic attraction. In addition, resonance Rayleigh scattering(RRS), secondary scattering(SOS) and frequency-doubling scattering(FDS) signals of the system have been enhanced obviously, and the biggest scattering wavelength located at 623 nm(RRS), 696 nm(SOS) and 343 nm(FDS), respectively. Under the optimum experimental conditions, enhanced peak signal(ΔI) has a good linear relation with the concentration of Cd~(2+)within a certain range. The detection limits were 0.28 μg/L(RRS), 0.17 μg/L(SOS) and 0.39 μg/L(FDS), respectively. This method has been used for the determination of Cd~(2+)in laboratory wastewater, Fujiang river water and tap water samples with recoveries of 95.1%~107.3%. Moreover, the reaction mechanism has also been discussed preliminarily.
引文
[1]刘意章,肖唐付,宁增平,等.三峡库区巫山建坪地区土壤镉等重金属分布特征及来源研究[J].环境科学, 2013,34(6):2390-2398.Liu Yizhang, Xiao Tangfu, Ning Zengping, et al. Cadmium and selected heavy metals in soils of Jianping area in Wushan County, the Three Gorges Region:distribution and source recognition[J]. Environmental Science, 2013, 34(6):2390-2398.
[2]邸万山.食品中镉的检测技术[J].理化检验:化学分册,2015,51(4):567-572.Di Wanshan. Review of determination techniques of cadmium in foods[J]. PTCA(Part B:Chem Anal), 2013, 34(6):2390-2398.
[3]李颖君,柴茜,井维鑫,等.镉锌在河南华溪蟹鳃中的吸收途径及亚细胞分布研究[J].环境科学学报, 2015,35(5):1581-1586.Li Yingjun, Chai Xi, Jing Weixin, et al. Uptake pathways and sub-cellular distributions of cadmium and zinc in the gills of freshwater crab Sinopotamon henanense[J]. Acta Scientiae Circumstiae, 2015,35(5):1581-1586.
[4]唐秋香,缪新.土壤镉污染的现状及修复研究进展[J].环境工程, 2013,31(S1):747-750.Tang Qiuxiang, Miao Xin. Progress of remediation on soil polluted by cadmium[J]. Environmental Engineering, 2013,31(S1):747-750.
[5]李丽和,张霖琳,滕恩江,等.不同酸消解体系测定大气颗粒物中的镉[J].中国环境监测, 2015,31(1):90-93.Li Lihe, Zhang Linlin, Teng Enjiang, et al. Determination of Cd in ambient particulate matter by different acid digestion system[J]. Environmental Monitoring in China, 2015,31(1):90-93.
[6]黄俭惠,卢汉堤.火焰原子吸收光谱法测定高锑烟尘中的银、铅、镉[J].中国无机分析化学, 2014,4(4):28-31.Huang Jianhui, Lu Handi. Determination of silver, lead and cadmium in high antimony smoke dust by flame atomic absorption spectrometry(FAAS)[J]. Chinese Journal of Inorganic Analytical Chemistry, 2014,4(4):28-31.
[7]陈明丽,付海阔,孟皓,等.离子液体双水相萃取-蒸气发生原子荧光法测定痕量镉[J].分析化学, 2010,38(9):1299-1304.Chen Mingli, Fu Haikuo, Meng Hao, et al. Determination of trace cadmium by atomic fluorescence spectrometry with ionic liquid two-aqueous phase extraction[J].Chinese Journal of Analytical Chemistry, 2010,38(9):1299-1304.
[8]李姌,王蒙,杨亚玲.分散液液微萃取-分光光度法测定食用菌中镉的含量[J].理化检验:化学分册,2017,53(12):1403-1406.Li Ran, Wang Meng, Yang Yaling. Spectrophotometric determination of cadmium in edible fungi with separation by dispersive liquid-liquid microextraction[J]. PTCA(Part B:Chem Anal), 2017,53(12):1403-1406.
[9]张世龙,吴周丁,刘小玲,等.电感耦合等离子体原子发射光谱法测定多金属矿石中铁、铜、铅、锌、砷、锑、钼和镉的含量[J].理化检验:化学分册, 2015,51(7):930-933.Zhang Shilong, Wu Zhouding, Liu Xiaoling, et al.ICP-AES determination of Fe, Cu, Pb, Zn, As, Sb, Mo and Cd in multi-metak ores[J]. PTCA(Part B:Chem Anal), 2015, 51(7):930-933.
[10]施文健,闻海峰,彭孟成.测定水体中镉的维多利亚艳蓝BO-碘分光光度法[J].环境与健康杂志, 2003,20(5):298-300.Shi Wenjian, Wen Haifeng, Peng Mengcheng. Determination of trace cadmium in river water by victoria pure blue BO-iodide spectrophotometry[J]. Environment Health, 2003,20(5):298-300.
[11] Tayyebeh M, Mazaher A, Maryam G, et al, Application of cysteamine functionalized CdS hollow nanospheres in determination of Cd(Ⅱ)and Pb(Ⅱ)in the presence of each other by resonance light scattering technique[J]. Journal of Environmental Chemical Engineering, 2016(4):3484–3491.
[12]米莹.荧光和共振瑞利散射光谱法测定某些无机金属离子的新方法研究[D].兰州:兰州交通大学, 2016.Mi Ying. New Methods for Determination of Some Inorganic Metal Ions by Fluorescence and Resonance Rayleigh Scattering Spectrometry[D]. Lanzhou:Lanzhou Jiaotong University, 2016.
[13]李国强.共振瑞利散射及共振非线性散射测定痕量重金属离子的方法研究[D].重庆:重庆大学, 2014.Li Guoqiang. Determination of Trace Amount of Heavy Metal Ions by Resonance Rayleigh Scattering and Resonance Nonlinear Scattering[D]. Chongqing:Chongqing University, 2014.
[14] Anglister J, Steinberg I Z. Resonance Rayleigh scattering of cyanine dyes in solution[J]. Chem Phys, 1983,78(9):5358-5368.
[15]孙谦,杨迎春,叶芝祥,等.汞(Ⅱ)-邻菲啰啉-刚果红缔合体系的共振瑞利散射和共振非线性散射光谱及分析应用[J].应用化学, 2013,30(4):474-479.Sun Qian, Yang Yingchun, Ye Zhixiang, et al. The resonance Rayleigh scattering and resonant nonlinear scattering spectra and analysis applications of Hg(Ⅱ)-phen-CR system[J]. Chinese Journal of Applied Chemistry, 2013,30(4):474-479.
[16]孙佳彦,奚建华,朱美华.碘化钾-维多利亚蓝B光度法测定塑料浸出液中痕量镉[J].化工环保, 1990,11(2):107-110.Sun Jiayan, Xi Jianhua, Zhu Meihua. Determination of trace cadmium in plastic leaching solution by potassium iodideVictoria Blue B spectrophotometry[J]. Environmental Protection of Chemical Industry, 1990,11(2):107-110.
[17] Jing T, Qiqi Z, Shaopu L, et al. Study on erythrosine-phenCd(Ⅱ)systems by resonance Rayleigh scattering, absorption spectra and their analytical applications[J]. Spectrochimica Acta Part A:Molecular and Biomolecular Spectroscopy, 2015(140):15-20.
[2]邸万山.食品中镉的检测技术[J].理化检验:化学分册,2015,51(4):567-572.Di Wanshan. Review of determination techniques of cadmium in foods[J]. PTCA(Part B:Chem Anal), 2013, 34(6):2390-2398.
[3]李颖君,柴茜,井维鑫,等.镉锌在河南华溪蟹鳃中的吸收途径及亚细胞分布研究[J].环境科学学报, 2015,35(5):1581-1586.Li Yingjun, Chai Xi, Jing Weixin, et al. Uptake pathways and sub-cellular distributions of cadmium and zinc in the gills of freshwater crab Sinopotamon henanense[J]. Acta Scientiae Circumstiae, 2015,35(5):1581-1586.
[4]唐秋香,缪新.土壤镉污染的现状及修复研究进展[J].环境工程, 2013,31(S1):747-750.Tang Qiuxiang, Miao Xin. Progress of remediation on soil polluted by cadmium[J]. Environmental Engineering, 2013,31(S1):747-750.
[5]李丽和,张霖琳,滕恩江,等.不同酸消解体系测定大气颗粒物中的镉[J].中国环境监测, 2015,31(1):90-93.Li Lihe, Zhang Linlin, Teng Enjiang, et al. Determination of Cd in ambient particulate matter by different acid digestion system[J]. Environmental Monitoring in China, 2015,31(1):90-93.
[6]黄俭惠,卢汉堤.火焰原子吸收光谱法测定高锑烟尘中的银、铅、镉[J].中国无机分析化学, 2014,4(4):28-31.Huang Jianhui, Lu Handi. Determination of silver, lead and cadmium in high antimony smoke dust by flame atomic absorption spectrometry(FAAS)[J]. Chinese Journal of Inorganic Analytical Chemistry, 2014,4(4):28-31.
[7]陈明丽,付海阔,孟皓,等.离子液体双水相萃取-蒸气发生原子荧光法测定痕量镉[J].分析化学, 2010,38(9):1299-1304.Chen Mingli, Fu Haikuo, Meng Hao, et al. Determination of trace cadmium by atomic fluorescence spectrometry with ionic liquid two-aqueous phase extraction[J].Chinese Journal of Analytical Chemistry, 2010,38(9):1299-1304.
[8]李姌,王蒙,杨亚玲.分散液液微萃取-分光光度法测定食用菌中镉的含量[J].理化检验:化学分册,2017,53(12):1403-1406.Li Ran, Wang Meng, Yang Yaling. Spectrophotometric determination of cadmium in edible fungi with separation by dispersive liquid-liquid microextraction[J]. PTCA(Part B:Chem Anal), 2017,53(12):1403-1406.
[9]张世龙,吴周丁,刘小玲,等.电感耦合等离子体原子发射光谱法测定多金属矿石中铁、铜、铅、锌、砷、锑、钼和镉的含量[J].理化检验:化学分册, 2015,51(7):930-933.Zhang Shilong, Wu Zhouding, Liu Xiaoling, et al.ICP-AES determination of Fe, Cu, Pb, Zn, As, Sb, Mo and Cd in multi-metak ores[J]. PTCA(Part B:Chem Anal), 2015, 51(7):930-933.
[10]施文健,闻海峰,彭孟成.测定水体中镉的维多利亚艳蓝BO-碘分光光度法[J].环境与健康杂志, 2003,20(5):298-300.Shi Wenjian, Wen Haifeng, Peng Mengcheng. Determination of trace cadmium in river water by victoria pure blue BO-iodide spectrophotometry[J]. Environment Health, 2003,20(5):298-300.
[11] Tayyebeh M, Mazaher A, Maryam G, et al, Application of cysteamine functionalized CdS hollow nanospheres in determination of Cd(Ⅱ)and Pb(Ⅱ)in the presence of each other by resonance light scattering technique[J]. Journal of Environmental Chemical Engineering, 2016(4):3484–3491.
[12]米莹.荧光和共振瑞利散射光谱法测定某些无机金属离子的新方法研究[D].兰州:兰州交通大学, 2016.Mi Ying. New Methods for Determination of Some Inorganic Metal Ions by Fluorescence and Resonance Rayleigh Scattering Spectrometry[D]. Lanzhou:Lanzhou Jiaotong University, 2016.
[13]李国强.共振瑞利散射及共振非线性散射测定痕量重金属离子的方法研究[D].重庆:重庆大学, 2014.Li Guoqiang. Determination of Trace Amount of Heavy Metal Ions by Resonance Rayleigh Scattering and Resonance Nonlinear Scattering[D]. Chongqing:Chongqing University, 2014.
[14] Anglister J, Steinberg I Z. Resonance Rayleigh scattering of cyanine dyes in solution[J]. Chem Phys, 1983,78(9):5358-5368.
[15]孙谦,杨迎春,叶芝祥,等.汞(Ⅱ)-邻菲啰啉-刚果红缔合体系的共振瑞利散射和共振非线性散射光谱及分析应用[J].应用化学, 2013,30(4):474-479.Sun Qian, Yang Yingchun, Ye Zhixiang, et al. The resonance Rayleigh scattering and resonant nonlinear scattering spectra and analysis applications of Hg(Ⅱ)-phen-CR system[J]. Chinese Journal of Applied Chemistry, 2013,30(4):474-479.
[16]孙佳彦,奚建华,朱美华.碘化钾-维多利亚蓝B光度法测定塑料浸出液中痕量镉[J].化工环保, 1990,11(2):107-110.Sun Jiayan, Xi Jianhua, Zhu Meihua. Determination of trace cadmium in plastic leaching solution by potassium iodideVictoria Blue B spectrophotometry[J]. Environmental Protection of Chemical Industry, 1990,11(2):107-110.
[17] Jing T, Qiqi Z, Shaopu L, et al. Study on erythrosine-phenCd(Ⅱ)systems by resonance Rayleigh scattering, absorption spectra and their analytical applications[J]. Spectrochimica Acta Part A:Molecular and Biomolecular Spectroscopy, 2015(140):15-20.
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