10-1-10-5mol/L (0.04-39000)ppm (0.014-14000)ppm(以氮计) (0.6-60000)ppm (0.02-40000)ppm (0.09-90000)ppm (0.99-9900)ppm pH范围 (2.5—11)pH (2—9)pH (2.5—11)pH (2.5—11)pH (2.5—11)pH (4-10)pH 常见干扰离子 NH4+,Na+ ...