In the latter method lead monoxide (195g) was added to 500 ml of 2M perchloric acid solution and a current of density 2.5mA cm-2 was passed. The deposit was removed, ground, and washed with water.

• 后一种方法是把195g PbO加到500ml 2mol/L的高氯酸溶液中；再通入电流密度为2.；5mA/cm2的电流；取出沉积物；将其捣碎并用水洗净。