Total Solids

This test method is a gravimetric procedure for determining Total Solids (TS) in water, wastewater, and sludge samples by measuring the residue remaining after drying.

Total Suspended Solids

This test method determines Total Suspended Solids (TSS) in water and wastewater samples. TSS refers to the dry weight of particles trapped by a glass fiber filter.

Total Volatile Solids

This test method is a procedure for determining Total Volatile Solids (TVS) in water, sludge, or wastewater samples. TVS refers to the portion of total solids that is lost upon ignition at 550°C, representing the organic matter content.

Turbidity

This test method is a procedure for measuring turbidity in water and wastewater using a turbidimeter, an instrument that detects the intensity of light scattered at a 90-degree angle by suspended particles in the sample.

Temperature

This test method is used to determine the temperature of a substance using a certified thermometer.

TKN [Kjeldahl Nitrogen – Soluble]

This test method is a procedure for the analysis of Total Kjeldahl Nitrogen (TKN), a key parameter used to determine the organic nitrogen and ammonia content in samples such as wastewater, soils, and agricultural products. The test sample is first filtered, then proceeds with the analysis of TKN.

TKN [Kjeldahl Nitrogen – Total as N]

This test method is a procedure for the analysis of Total Kjeldahl Nitrogen (TKN), a key parameter used to determine the organic nitrogen and ammonia content in samples such as wastewater, soils, and agricultural products.

Sodium Absorption Ratio

This test method is a calculation that is a commonly used index in water and soil science that indicates the relative concentration of sodium (Na⁺) to calcium (Ca²⁺) and magnesium (Mg²⁺) in water.

Sulfate [Water]

This test method is a turbidimetric procedure used to determine sulfate (SO₄²⁻) concentrations in water samples. This method is widely used due to its simplicity, rapid results, and reliability for routine water quality testing.

Oil & Grease

This test method is a standard procedure used for the quantitative analysis of oil and grease in water and wastewater samples. It is commonly employed to monitor pollution and compliance with environmental regulations.