警报型即时检测自来水体中铅含量的方法研究

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	警报型即时检测自来水体中铅含量的方法研究
	潘大为
刊名	环境科学与技术
	2015
卷号	38 期号:1 页码:49-54
关键词	警报型即时检测铅离子方法研究
ISSN号	1003-6504
其他题名	Method of Lead Detection in Tap Water by Alert-type Point-ofcare Test
产权排序	烟台海岸带研究所,中国科学院烟台海岸带研究所
中文摘要	以Bi(Ⅲ)做内标,结合丝网印刷电极与微型化的电化学检测系统,建立了一种警报型即时检测方法,可以对自来水中铅含量是否超标进行快速准确的判断。采用方波溶出伏安法测定了含10μg/L铅标准溶液的I_(Pb)/I_(Bi)并计算得出阈值。讨论了3种电极预处理方法以及不同浓度Cu~(2+)对I_(Pb)/I_(Bi)测定的干扰与消除。实验结果表明:电极经1.8 V阳极氧化处理2 min后,电子转移电阻大大减小,由4 348Ω减小至715Ω,峰电流增加1.6倍,峰电位之差△E_p由212 m V减小至113 m V。当加入2.0 mmol/L Fe(CN)_6~(4-),Cu~(2+)干扰可有效消除。将这种方法用于自来水样的I_(Pb)/I_(Bi)测定,与阈值对比给出Yes/No判断结果,通过ICP-MS验证方法的有效性,结果令人满意。作为一种简捷、快速和便携的检测平台,该方法无需测出Pb~(2+)的准确浓度,具有巨大的应用潜力。
英文摘要	Combined with screen printed electrode and custom USB electrochemical system (muECS), bismuth served as internal standard is used for the construction of alert-type point-of-care testing method to decide whether the lead level has excessed a regulated threshold. The threshold is obtained by determining standard solution containing 10 mug/L Pb~(2+) with square wave anodic stripping voltammetry (SWV). Three electrode pretreatment methods as well as the interference and removal of Cu~(2+) were discussed. Results indicated that a remarkable decreased charge transfer resistance from 4 348 Omega to 715 Omega was observed after electrode was pretreated at 1.8 V for 2 min and the peak current increased 1.6-fold with peak potential separation decreasing from 212 mV to 113 mV. The detrimental effect of Cu~(2+) can be circumvented effectively by adding 2.0 mmol/L Fe (CN)_6~(4-). The proposed method is applied to the decision of Pb~(2+) in tap water samples and to give a Yes/No signal. ICP-MS analysis is performed to validate the reliability, and the results are satisfying. Simple, rapid and portable, the platform holds great potential for the application in daily life.
收录类别	CSCD
语种	中文
CSCD记录号	CSCD:5355151
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/8390]
专题	烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
推荐引用方式 GB/T 7714	潘大为. 警报型即时检测自来水体中铅含量的方法研究[J]. 环境科学与技术,2015,38(1):49-54.
APA	潘大为.(2015).警报型即时检测自来水体中铅含量的方法研究.环境科学与技术,38(1),49-54.
MLA	潘大为."警报型即时检测自来水体中铅含量的方法研究".环境科学与技术 38.1(2015):49-54.