金属钌配合物Ru(ppy)(bpy)2+(1,bpy=2,2’-二联吡啶,Hppy=2-苯基吡啶)可用于检测水溶液中的亚硝酸盐。在p H<5.8的缓冲溶液中,该配合物在400 nm到700 nm范围内的强吸收因亚硝酸根的加入而淬灭,溶液的颜色由深红色变为浅黄色。这种明显的颜色变化表明它可以作为亚硝酸根的比色传感器,检测限为22μmol/L。 Metal ruthenium complexes Ru (ppy) (bpy) 2+ (1, bpy = 2,2’-bipyridine, Hppy = 2-phenylpyridine) can be used to detect nitrite in aqueous solution. The strong absorption of this complex in the range of 400 nm to 700 nm was quenched by the addition of nitrite in a buffer solution with p H <5.8. The color of the solution changed from dark red to light yellow. This significant color change indicates that it can be used as a nitrite colorimetric sensor with a detection limit of 22 μmol / L.