This test method is a colorimetric method used to determine ferrous iron (Fe²⁺) concentration in water and wastewater. The method utilizes 1,10-phenanthroline, which forms an orange-red complex with ferrous iron that can be measured spectrophotometrically.
This test method is a standardized test method used to determine the flash point of petroleum products and other liquids using an automated flash point analyzer. The flash point is the lowest temperature at which a sample emits sufficient vapor to ignite in the presence of an ignition source under controlled conditions.
This test method is a procedure for determining total fluoride in water and wastewater using an ion-selective electrode (ISE). This method is widely used due to its simplicity, speed, and ability to measure a wide range of fluoride concentrations without complex instrumentation.
This test method is a classical ninhydrin colorimetric method used to determine free amino nitrogen (FAN) in malt, wort, and beer. FAN is an essential nutrient for yeast during fermentation, and its measurement is critical for assessing the fermentability and nutritional quality of brewing materials.
This test method is a titrimetric method used to determine the free fatty acid (FFA) content in animal feed. Oil is extracted from the feed sample prior to a titration to determine the free fatty acid content. It is a key quality control measure, as elevated FFA levels can indicate hydrolytic rancidity, degradation, or poor… Continue reading Free Fatty Acids [Feed]
This test method uses static headspace gas chromatography with flame ionization detection (GC–FID) to measure fusel alcohols—higher-chain alcohols produced during fermentation. The measurement of fusel alcohols is important for quality control, regulatory compliance, and detecting potential adulteration or off-spec fermentation. This test method identifies isopropanol, N-propanol, isobutanol, isoamyl alcohol, and N-amyl alcohol.
This test method uses static headspace gas chromatography with flame ionization detection (GC–FID) to measure fusel alcohols—higher-chain alcohols produced during fermentation. The measurement of fusel alcohols is important for quality control, regulatory compliance, and detecting potential adulteration or off-spec fermentation. This test method identifies isopropanol, N-propanol, isobutanol, isoamyl alcohol, and N-amyl alcohol.
This test method determines the concentration of glycerin with a calculation involving the specific gravity and relative density of the glycerin sample.
This test method is a standard titrimetric procedure used to measure total hardness and calcium hardness in water, both expressed as mg/L of calcium carbonate (CaCO₃). Hardness is primarily due to the presence of calcium (Ca²⁺) ions.
This test method is a titrimetric method used to determine the free fatty acid (FFA) content in animal fats, vegetable oils, and other lipid-based products. It is a key quality control measure, as elevated FFA levels can indicate hydrolytic rancidity, degradation, or poor handling of the fat or oil.