The impact of TDS on coffee

Abbreviated as TDS, also known as the total amount of dissolved solids. The unit of measurement is milligrams per liter, which indicates how many milligrams of dissolved solids are dissolved in 1 liter of water. The higher the TDS value, the more dissolved matter the water contains. Total dissolved solid refers to the total amount of all solutes in water, including both inorganic and organic matter.

Coffee contains many tiny solids, which are the ingredients that make coffee taste. Or in other words, TDS digitizes the ingredients in coffee, which is closely related to the concentration of coffee.

In the coffee liquid we extract, the water used to extract coffee accounts for about 98% of the total coffee. As a result, in the extraction of coffee taste, there is a variable that is easy to be ignored, that is, the water used to make coffee, while the choice and use of water can influence the feeling of coffee in the throat.

Where PPM is the unit of TDS. PPM (part per million) is a unit of concentration of parts per million. Refers to the number of milliliters of solute in 1 million ml solution or indicates the number of grams of solute in 1 million grams of solution. It contains 1 gram of soluble substance in one ton of water. Both

The TDS value is too high, the minerals in the water are supersaturated, and there is not enough room to extract the flavor factors from the coffee.

It means that the more soluble matter in the water, the lower the extraction rate in the extraction of coffee body.

If the TDS value is too low, there are relatively few minerals in the water, which may cause excessive extraction.

It means that the less soluble matter in the water, so the higher the extraction rate of coffee.

At the end is a copy of the American Fine Coffee Association (SCAA) recommendations on the parameters for brewing coffee:

Smell: clean, fresh, no miscellaneous smell

Color: clear

Total chlorine content: 0 mg/L (acceptable range: 0 mg/L)

Solid content in water: 150mg/L (acceptable range: 75-250mg/L)

Hardness: 4 crystals or 68mg/L (acceptable range: 1-5 crystals or 17-85mg/L)

Total alkali content: about 40mg/L

Ph: 7.0 (acceptable range: 6.5-7.5)

Sodium content: about 10mg/L