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首页> 外文期刊>Mikrochimica Acta: An International Journal for Physical and Chemical Methods of Analysis >A monolithic copolymer prepared from N-(4-vinyl)-benzyl iminodiacetic acid, divinylbenzene and N,N '-methylene bisacrylamide for preconcentration of cadmium(II) and cobalt(II) from biological samples prior to their determination by ICP-MS
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A monolithic copolymer prepared from N-(4-vinyl)-benzyl iminodiacetic acid, divinylbenzene and N,N '-methylene bisacrylamide for preconcentration of cadmium(II) and cobalt(II) from biological samples prior to their determination by ICP-MS

机译：由ICP-MS测定之前，由N-（4-乙烯基） - 苄基二烯乙酸，二乙烯基苯和N，N，N' - 甲基双丙烯酰胺用于从生物样品中的镉（II）和钴（II）的前浓缩

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摘要

A capillary monolith consisting of poly[N-(4-vinyl)-benzyl iminodiacetic acid-co-divinylbenzene-co-N,N-methylene bisacrylamide), referred to as poly(VBIDA-DVB-Bis), has been prepared. It is shown to be an efficient sorbent for the enrichment of Co(II) and Cd(II). The two ions are completely retained by the monolith in the pH range from 4.0 to 9.0. The breakthrough curve tests were adopted to evaluate the adsorption performance of the monolith towards Co(II) and Cd(II). A dose-response model was used to describe the breakthrough curves of the two ions at different initial concentrations. The adsorption capacities for Co(II) and Cd(II) are 1.54 and 1.73 mg.m(-1) at a concentration level of 2.5 mg.L-1, respectively. The enrichment factor is 100, and the required sample volume is 5 mL. Following elution of the two ions with 0.5 M HNO3, they were quantified by ICP-MS. The limits of detection in a 1 mL sample are 0.35 ng.L-1 for Co(II) and 0.44 ng.L-1 for Cd(II). The method was applied to the determination of Co(II) and Cd(II) in spiked rice, human urine and seawater samples.
机译：已经制备由聚（4-（4-乙烯基） - 苄基二烯二乙酸 - 共分二乙烯基苯甲苯基苯-CO-N，N-亚甲基双丙烯酰胺）组成的毛细管整料。显示为富集CO（II）和CD（II）的有效吸附剂。两离子通过4.0至9.0的pH范围内的整料完全保留。采用突破性曲线试验评价朝向CO（II）和CD（II）的整料的吸附性能。剂量响应模型用于描述不同初始浓度下两离子的突破曲线。 CO（II）和CD（II）的吸附容量分别为1.54和1.73mg.m（-1），分别为2.5mg.L-1。富集因子为100，所需的样品体积为5mL。在用0.5M HNO3洗脱两离子后，通过ICP-MS量化它们。 1mL样品中检测的极限为CD（II）的CO（II）和0.44ng.L-1的0.35ng.L-1。将该方法应用于尖米，人尿和海水样品中Co（II）和CD（II）的测定。

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