王志强,王 辉,张志豪,刘 刚,姚艳芝.基于电化学和虚拟仪器的土壤重金属检测系统研究[J].农业机械学报,2015,46(1):119-126.
Wang Zhiqiang,Wang Hui,Zhang Zhihao,Liu Gang,Yao Yanzhi.Detection System of Heavy Metals in Soil Based on Electrochemistry and Virtual Instrument[J].Transactions of the Chinese Society for Agricultural Machinery,2015,46(1):119-126.
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基于电化学和虚拟仪器的土壤重金属检测系统研究   [下载全文]
Detection System of Heavy Metals in Soil Based on Electrochemistry and Virtual Instrument   [Download Pdf][in English]
投稿时间:2014-03-17  
DOI:10.6041/j.issn.1000-1298.2015.01.018
中文关键词:  土壤 重金属检测 电化学 丝网印刷电极 虚拟仪器
基金项目:国家高技术研究发展计划(863计划)资助项目(2011AA100704)和高等学校博士学科点专项科研基金资助项目(20120008110033)
作者单位
王志强 山东理工大学
中国农业大学 
王 辉 中国农业大学 
张志豪 中国农业大学 
刘 刚 中国农业大学 
姚艳芝 山东理工大学 
中文摘要:采用超声波辅助提取法对土壤样本进行快速前处理,以铋膜修饰丝网印刷电极作为传感器,结合差分脉冲阳极溶出伏安法对土壤浸提液中的铅和镉进行精确测量。检测仪器以LabView平台软件为工作核心,结合MSP430单片机、恒电位电路、I/V转换电路、电磁阀和蠕动泵等硬件设备实现了对土壤浸提液的自动进样、电化学分析以及排液清洗等铅和镉的操作。针对实际土壤样本测量时可能产生的误差,分别采用了概率统计算法以及多次标准添加法加以消除。系统检测限分别达到2.6μg/L和1.8μg/L。对不同地区采集到的多个土壤样本进行分析,结果表明该系统具有检测精度高、重现性好、速度快、功耗低等优点,适合对农田土壤重金属进行快速检测和评估。
Wang Zhiqiang  Wang Hui  Zhang Zhihao  Liu Gang  Yao Yanzhi
Shandong University of Technology;China Agricultural University,China Agricultural University,China Agricultural University,China Agricultural University and Shandong University of Technology
Key Words:Soil Heavy metals detection Electrochemical Screen printed electrodes Virtual instrument
Abstract:A detection system for rapid monitoring heavy metals in soil based on electrochemical and virtual instrument technology was developed. The ultrasonic-assistant extraction technique was used for rapid pretreatment of soil samples. Single use sensors bismuth film modified screen-printed electrodes coupled with differential pulse anodic stripping voltammetry (DPASV) provided a rapid, accurate screening system for the simultaneous determination of cadmium and lead in soil. The control program, developed in LabView, was adopted as control kernel, by combining the MSP430 microcontroller, the potentiostat circuit, I/V conversion circuit, peristaltic pump and electromagnetic valve. This system realized the automatic measurement. The probability statistics algorithms and the standard addition method were employed to overcome the inherent measurement errors existed in real soil analysis and the system detection limits were 1.8μg/L for cadmium and 2.6μg/L for lead, respectively. Experimental results showed that the system possesses many advantages such as high precision, good reproducibility, high speed and low power consumption, which was suitable for rapid evaluation and measurement of heavy metals in soil.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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