Korean Journal of Environmental Agriculture (한국환경농학회지)

The Korean Society of Environmental Agriculture (한국환경농학회)
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Equipment Development for Inorganic-Compound Concentration Measurement in a Hydroponic Culture Solution

수경배양액 무기성분농도 측정장치 개발

  • 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)
  • 허정욱 (농촌진흥청 국립농업과학원 농업공학부) ;
  • 박경훈 (농촌진흥청 감사담당관실) ;
  • 홍승길 (농촌진흥청 기술협력국) ;
  • 이재수 (농촌진흥청 국립농업과학원 농업공학부) ;
  • 백정현 (농촌진흥청 국립농업과학원 농업공학부) ;
  • 박종택 ((주)티맥) ;
  • 이승기 (공주대학교 산업과학대학 생물산업공학부)
  • Received : 2020.10.26
  • Accepted : 2020.11.04
  • Published : 2020.12.31
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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

References

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