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 isolates individual bacterial colonies from a mixed culture using aseptic technique, enabling the growth of pure cultures for identification, characterization, or further testing.
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 simple, packed, volumetric technique used to measure the mass per unit volume of a granular or powdered material, including any voids between particles. This value is important for evaluating flow properties, packaging efficiency, and handling characteristics of materials like grains, powders, or animal feed.
This test method involves chemically modifying amino acids after hydrolysis to form stable, UV- or fluorescence-detectable derivatives. This enhances detection sensitivity and allows efficient separation using reversed-phase UPLC columns. Samples undergo acid hydrolysis to release free amino acids, which are then reacted with a derivatizing reagent (e.g., AccQ•Tag™) to form stable derivatives. These derivatized amino… Continue reading Amino Acids [Taurine] Pre-col AQC Der
This test method involves chemically modifying tryptophan to form stable, UV- or fluorescence-detectable derivatives before chromatographic separation. Because tryptophan is sensitive to acid hydrolysis, alkaline hydrolysis is commonly used to release tryptophan without degradation. The derivatized tryptophan is then separated on a reversed-phase UPLC column and detected using UV or fluorescence detectors. This method allows… Continue reading Amino Acids [Tryptophan] Pre-col AQC Der
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