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 (18 hr)]
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 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 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
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 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