Total suspended solids Guide, Meaning , Facts, Information and Description
Total suspended solids is a water quality measurement usually abbreviated TSS. This parameter used to be called non-filterable residue (NFR), a term that refers to the identical measurement: the dry-weight of particles trapped by a filter. However, the term "non-filterable" suffered from an odd (for science) condition of usage: in some circles (Oceanography, for example) "filterable" meant the material retained on a filter, so non-filterable would be the water and particulates that passed through the filter. In other disciplines (Chemistry and Microbiology for example) and dictionary definitions, "filterable" means just the opposite: the material passed by a filter. So non-filterable was the retained residue.TSS of a water sample is determined by pouring a measured volume of water (typically 1 liter; but less if the particulate density is high, or as much as 2 or 3 liters for very clean water) through a filter of a specified pore size, then weighing the filter again after drying to remove all water. The gain in weight is a dry weight measure of the particulates present in the water sample greater than the filter pore size and is expressed in units derived from the volume of water filtered.
See also: Turbidity
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