Mineral water is water containing dissolved minerals or more gases. The nine limit indicators specified in the national standard include lithium, strontium, zinc, selenium, bromide, iodide, metasilicic acid, free carbon dioxide and total dissolved solids. , Mineral water must have one or more requirements that meet the limit indicators, and the required content is (unit: mg/L): lithium, strontium, zinc, and iodide are all ≥ 0.2, selenium ≥ 0.01, bromide ≥ 1.0, metasilicic acid≥25, free carbon dioxide≥250 and total dissolved solids≥1000. Most of the mineral water on the market is of strontium (Sr) type and metasilicate type, and there are also mineral waters with other mineral components.