Measurement of total dissolved solids (TDS)

Total dissolved solids (TDS) is a measure of the dissolved content of minerals and organics in a liquid that are suspended in molecular, ionized, or microgranular (colloidal) form. TDS concentrations are often reported in parts per million (ppm).

TDS Test

Total Dissolved Solids (TDS) is a measure of the dissolved content of minerals and organics in a liquid that are suspended in molecular, ionized, or microgranular (colloidal) form. TDS concentration is often reported in parts per million (ppm). The TDS concentration of water can be determined using a digital TDS meter.

What does total dissolved solids indicate?

TDS stands for total dissolved solids and represents the concentration of all dissolved substances in water. Common inorganic salts found in water can include calcium, magnesium, potassium, and sodium, which are all cations, and carbonates, nitrates, bicarbonates, chlorides, and sulfates, which are all anions.

Is water with high TDS harmful?

Water with high TDS values of around 1000 ppm is considered unsuitable for human consumption. High TDS values are caused by the presence of potassium, chloride, and sodium ions, which are toxic in higher amounts. It is also undesirable to drink because it may have a salty, metallic or bitter taste.

It is also used in industry due to the formation of deposits in cooling and heating systems, which reduces the efficiency and productivity of facilities.

Relationship between electrical conductivity and TDS

Electrical conductivity (EC) and total dissolved solids (TDS) are water quality parameters used to describe the level of salinity. These two parameters are correlated and are usually expressed by a simple equation: TDS = k EC (at 25 °C). The process of obtaining TDS from a water sample is more complicated than EC. For this reason, TDS analysis is very important because it can indicate the quality of groundwater. In addition, TDS concentration analysis can be used to review water quality from EC value. For greater accuracy, TDS concentration should be determined using the gravimetric method in the laboratory.

* Abrizan Company's laboratories, located in Fars Science and Technology Park, are capable of measuring various water parameters, including TDS, with experienced staff and the use of advanced devices and equipment.