METHOD AND APPARATUS FOR DETECTING CONCENTRATION OF NITRATE ION AND NITRITE ION, AND PLANT GROWTH AND PROLONGATION AGENT MANUFACTURING APPARATUS

摘要

To provide a method and an apparatus enabling non-contact measurement of the concentration of nitrate ion and nitrite ion, and a plant growth and prolongation agent manufacturing apparatus, which incorporates the apparatus.SOLUTION: A concentration detection apparatus includes: an inspection area forming unit 1 capable of passing or storing liquid for concentration detection in an air gap 13 formed by an appropriate gap with wall surfaces 11 and 12 which can at least transmit 1% or more of light having a wavelength of 200 nm to 400 nm; light sources 2 and 3 emitting light at least within wavelength ranges of 270 nm to 330 nm and of 350 nm to 400 nm so that the light passes through the inspection area forming unit from outside the wall of the inspection area forming unit; and light detecting units 4 and 5 for detecting the intensity of light transmitted through the inspection area forming unit. A plant growth and prolongation agent manufacturing apparatus comprises a concentration detection apparatus and plasma irradiation means.SELECTED DRAWING: Figure 1