NDLI: Measurement Experiment and Mathematical Model of Nitrate Ion Selective Electrode

Content Provider	IEEE Xplore Digital Library
Author	Zhikai Chang Ying Zhu Li Zhang Shangfeng Du
Copyright Year	2013
Description	Author affiliation: Coll. of Inf. & Electr. Eng, China Agric. Univ., Beijing, China (Zhikai Chang; Ying Zhu; Li Zhang; Shangfeng Du)
Abstract	Compared with conventional laboratory chemical analysis, ion selective electrode (ISE) is time-saving, low-cost, ease of use and pollution-free. To detect soil nitrate nitrogen content rapidly, a nitrate ion selective electrode could be used. This paper studied characteristics of nitrate ISE. Potentiometric experiments utilizing nitrate ISE to measure sodium nitrate solution were conducted during the study. A linear regression model based on the Nernst equation was built using the least square method. Several groups of potential values were measured at one concentration and then the arithmetic mean of them was calculated. These mean values and their corresponding concentrations were used in LSM to reduce the impact of the relatively poor repeatability of ISE and reduce nitrate concentration prediction errors. The feasibility of the modeling method was verified using prediction errors as an index. In this study, extra data points except the calibration points were used to test the prediction error. Except several singular points, the relative error of this model was from 1.3% to 13.67% (absolute value). Compared with calibration each time, this modeling method can be used to determinate the nitrate concentration if ISE will be calibrated after using for a certain number of times.
Sponsorship	IEEE Comput. Soc.
Starting Page	48
Ending Page	52
File Size	195596
Page Count	5
File Format	PDF
ISBN	9780769551227
DOI	10.1109/IMCCC.2013.18
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-09-21
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electrodes Ion selective electrode Electric potential Repeatability Measurement experiment Linear regression model Soil Calibration Pollution measurement Mathematical model Nitrate nitrogen Equations
Content Type	Text
Resource Type	Article

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