The characteristic index 17O-NMR half peak width (expressed in Hertz Hz) value should be less than 100. If "low Hertz water" or "ultra-low Hertz water" is to be labeled, it should comply with the provisions in Table 1.
T/BJWA 004-2022 history
2022T/BJWA 004-2022 Low Hertz 17O-NMR FWHM Natural Drinking Water