ISO 10523:2008规定了一种测定雨水、饮用水和矿泉水、洗澡水、地表水和地下水以及城市和工业废水和液体污泥中pH值的方法,pH值在pH 2至pH 12范围内,离子强度低于I=0.3 mol/kg(25°C下的电导率<2 000 mS/m)溶剂,温度范围为0°C至50°C。
ISO 10523:2008 specifies a method for determining the pH value in rain, drinking and mineral waters, bathing waters, surface and ground waters, as well as municipal and industrial waste waters, and liquid sludge, within the range pH 2 to pH 12 with an ionic strength below I = 0,3 mol/kg (conductivity at 25 °C <2 000 mS/m) solvent and in the temperature range 0 °C to 50 °C.