Negatively Ionize Water through boiling

In Andrea Moritz' book "The timeless secrets of health and rejuvination" he recommends that one boil water (purified) for fiteen to twenty minutes. He claims that when the water is boiled for that period of time the water becomes negatively ionized. He then recommends that it be put in a thermos flask and sipped throughout the day for a "cleansing effect". Does anyone on this forum know if this is true? Any input is appreciated. Tweet