2026-03-09T14:35:47Z https://repository.naro.go.jp/oai

oai:repository.naro.go.jp:00001947 2023-05-15T16:14:09Z 87:591:655:132:326

ISFET 硝酸イオンセンサの試作と野菜の硝酸含量測定への応用 Nitrate Ion Determination of Vegetables using a Portable ISFET-Nitrate Ion Sensor 伊藤, 秀和 イトウ, ヒデカズ ITO, Hidekazu 脇田, 慎一 ワキダ, シンイチ WAKIDA, Shin-ichi We prepared a prototype of the ion sensitive field effect transistor (ISFET)-nitrate ion sensor for vegetables using copper (Ⅰ) complex as a nitrate ion-sensing material, 2-nitrophenyldodecyleher (NPDDE) as a liquid membrane material (platicizer) and poly(vinyl chloride) (PVC) as a conventional membrane material. The above-mentioned tetrahydrofran (THF) solution was casted onto the gate part of the ISFET-pH instrument, THF was evaporated at room temperature. The water solution of fumarate was dropped on the gate and reference electrode to wash. The water solution of potassium nitrate was measured and the calibration was developed. Juice of vegetable samples was collected and filtrated with a disposable filter (pore size 0.2 μm). Measuring times of the instrument were shorter than a conventional, card-shaped nitrate ions selective electrode (ISE). The instrument showed almost identical accuracy with a commercialized nitrate ISE, a high correlation (n=10, R=0.99^**) with ion chromatography, and no correlation with pH. 国立研究開発法人 農業・食品産業技術総合研究機構 野菜茶業研究所 2016-03-25 jpn departmental bulletin paper VoR https://doi.org/10.24514/00001864 https://repository.naro.go.jp/records/1947 10.24514/00001864 10.24514/00001864 1346-6984 野菜茶業研究所研究報告 Bulletin of the National Institute of Vegetable and Tea Science 15 11 17 https://repository.naro.go.jp/record/1947/files/nivts_report_No15p11-17p.pdf application/pdf 1.6 MB 2019-03-19