This test method is a semi-quantitative test used to detect and characterize specific groups of bacteria in water, soil, and biofilm samples. It is commonly used to identify the presence and activity of bacteria such as iron-related bacteria (IRB), sulfate-reducing bacteria (SRB), slime-forming bacteria, and others involved in biofouling, corrosion, or water quality issues.
This test method is a standardized procedure for determining 5-day Biochemical Oxygen Demand (BOD₅) in water and wastewater. BOD measures the amount of dissolved oxygen (DO) consumed by microorganisms while breaking down organic matter under aerobic conditions over a 5-day period at 20 °C. It is widely used to assess the organic pollution load and treatment… Continue reading BOD
This test method is a standardized procedure for determining 5-day Biochemical Oxygen Demand (BOD₅) in water and wastewater. BOD (Soluble) first filters particulate matter from the sample, then measures the amount of dissolved oxygen (DO) consumed by microorganisms while breaking down organic matter under aerobic conditions over a 5-day period at 20 °C. It is widely… Continue reading BOD [Soluble]
This test method is a colorimetric procedure used to determine ammonia nitrogen (NH₃-N) in water and wastewater samples. The method uses the automated phenate reaction, in which ammonia reacts with phenol and hypochlorite under alkaline conditions to form a blue-colored indophenol complex. The intensity of this color is measured spectrophotometrically and is directly proportional to… Continue reading Ammonia as N Low Range
This test method is a colorimetric procedure used to determine ammonia nitrogen (NH₃-N) in water and wastewater samples, with a pre-analysis distillation of the test sample. The method uses the automated phenate reaction, in which ammonia reacts with phenol and hypochlorite under alkaline conditions to form a blue-colored indophenol complex. The intensity of this color… Continue reading Ammonia as N Low Range with Distillation
This test method is a classic analytical technique used to determine ammonia nitrogen (NH₃-N) in water samples. It involves alkalizing the sample to convert ammonium ions to ammonia gas, which is then distilled, captured in an acid solution, and quantified by titration. This method measures the concentration of ammonia as nitrogen and is widely used… Continue reading Ammonia as N [Water]
This test method is based on Standard Methods for the Examination of Water and Wastewater and is used to determine alkalinity in water samples. Alkalinity measures the water’s capacity to neutralize acids. A measured volume of water sample is placed in a beaker. The sample is titrated with a standardized sulfuric or hydrochloric acid solution… Continue reading Alkalinity