This test method is a procedure to determine Carbonaceous Biochemical Oxygen Demand (CBOD₅) over a 5-day incubation period. CBOD measures the amount of dissolved oxygen consumed by microorganisms specifically during the oxidation of carbonaceous (organic) material, excluding oxygen demand from nitrogenous compounds like ammonia. This method is commonly used for evaluating the organic pollution load… Continue reading CBOD
This test method is a colorimetric spectrophotometric method used to determine free and total chlorine in water using a color reagent. In this method, chlorine reacts with color reagent, and the intensity of the color is measured with a spectrophotometer to quantify chlorine concentration.
This test method is a colorimetric spectrophotometric method used to determine free and total chlorine in water using a color reagent. In this method, chlorine reacts with color reagent, and the intensity of the color is measured with a spectrophotometer to quantify chlorine concentration.
This test method is a colorimetric spectrophotometric method used to determine free and total chlorine in water using a color reagent. In this method, chlorine reacts with color reagent, and the intensity of the color is measured with a spectrophotometer to quantify chlorine concentration.
This test method is a colorimetric test used to determine Chemical Oxygen Demand (COD) in water and wastewater samples. COD measures the amount of oxygen required to chemically oxidize organic and inorganic matter in a sample, indicating the pollution or organic load. This method uses a dichromate digestion followed by spectrophotometric measurement.
This test method describes the enzyme-substrate-based detection of total coliforms and Escherichia coli in drinking water, surface water, and wastewater using the Colilert® test. This method is based on defined substrate technology, where specific enzymes produced by coliforms and E. coli react with added substrates to produce color and fluorescence, allowing for easy detection after… Continue reading Coliform / E.coli [P/A (24 hr)]
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 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 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