DIN 38404-18-1994
德国检验水、废水和污泥的标准方法.物理的及物理化学的参数(C组).测定饮用水,地下水,地面水,和废水中镭226放射性浓度(C18)
German standard methods for the examination of water, waste water and sludge; physical and physical-chemical parameters (group C); determination of Radium-226-concentration in potable water, ground water, surface water and waste water (C 18)