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 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 cross-method calculation used to determine the total carbohydrate content of a sample, utilizing crude protein, crude fat, moisture, and ash analyses to calculate total carbohydrates by difference. The calculation assumes that the remainder after accounting for the protein, fat, moisture, and ash represents carbohydrates, including sugars, starches, and dietary fiber.
This test method is a cross-method calculation used to determine the energy content of a sample, utilizing total carbohydrate, crude fat, and crude protein analyses in the “4-9-4 rule,” where there are 4 calories per gram of carbohydrates, 9 calories per gram of fat, and 4 calories per gram of protein in a sample.
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 presumptive quantification of clostridium spp. in fermentation samples found within the ethanol production process.
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 measures an oil’s resistance to crystallization, serving as an indicator of winterization efficiency and stearin removal. It is applicable to normal, refined, and dry animal and vegetable oils.
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)]