Solid (English: Total dissolved solids, abbreviated TDS), also known as the total amount of dissolved solids, is measured in mg/L, indicating how many milligrams are dissolved in 1 liter of water.dissolveSolid matter. The higher the TDS value, the more dissolved substances in the water. Total dissolved solids refer to the total amount of all solutes in the water, includingInorganic substanceand有机化合物The content of both. Generally, it can be expressed asconductivityIt is generally understood that the higher the conductivity of a solution, the higher the salt content and the total dissolved solids (TDS).Inorganic substanceIn Chinese, in addition to the components dissolved into ionic form, there may also be inorganic molecules. Since the organic matter and inorganic molecules in natural water are generally not considered, the total dissolved solids are also referred to as the total dissolved solids. However, in specific water, TDS cannot effectively reflect the water quality. For example, the electrolysis water, due to the significant increase in [OH]- and other charged ions after electrolysis, the corresponding electrical conductivity is abnormally increased. For example, the original TDS of 17 in pure water after electrolysis by the electrolysis water machine.AlkalineThe TDS value of water is approximately 300.