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http://dx.doi.org/10.5338/KJEA.2020.39.4.38

Equipment Development for Inorganic-Compound Concentration Measurement in a Hydroponic Culture Solution  

Heo, Jeong-Wook (Department of Agricultural Engineering, National Academy of Agricultural Science, Rural Development of Administration)
Park, Kyeong-Hun (Audit and Inspection Office, Rural Development of Administration)
Hong, Seung-Gil (Korea Program on International Agriculture, Rural Development of Administration)
Lee, Jae-Su (Department of Agricultural Engineering, National Academy of Agricultural Science, Rural Development of Administration)
Baek, Jeong-Hyun (Department of Agricultural Engineering, National Academy of Agricultural Science, Rural Development of Administration)
Park, Jong-Taek (T-MAC)
Lee, Seung-Kee (Major in Bio-Mechnical Engineering, Kongju National University)
Publication Information
Korean Journal of Environmental Agriculture / v.39, no.4, 2020 , pp. 319-326 More about this Journal
Abstract
BACKGROUND: Measurement equipment was developed for inorganic nutrient concentration inside the hydroponic culture medium with several macro- and micro compositions, and applied for measuring the compositions of conventional medium. METHODS AND RESULTS: Before the equipment development, sonicator and heater were utilized to control temperature around of the module mixing with color reagents and target samples among the inorganic compositions. The measurement module and multi-sampler were also manufactured based on the COMS (Complementary Metal-Oxide Semiconductor) and installed inside the measurement equipment. Concentration of standard solution, value measured by the equipment, standard deviation or measured average value were used for estimating the accuracy and average recall of the equipment. Yamazaki solutions with EC of 0.5, 1.5, and 2.5 dS/m were offered to confirm the equipment accuracy and standard error. CONCLUSION: It was suggested that the developed equipment could be automatically applied for measurement with accuracy of over 96% and standard errors of less than 5% on 12 macro- and micro compositions such as a NO3-N, PO43- or Fe.
Keywords
Absorbance; Hydroponics; Inorganic Nutrients; Measurement Module;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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