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 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 standard procedure for measuring dissolved oxygen (DO) in water and wastewater samples using a membrane electrode (electrochemical sensor). This method is widely used for environmental monitoring, wastewater treatment, and water quality assessments.
This test method is a spectrophotometric method based on the NCASI (National Council for Air and Stream Improvement) Method 253 for determining true color in water and wastewater. It quantifies color in Platinum-Cobalt Units (PCU), also known as Color Units (CU), using standardized absorbance measurements at 455 nm.
This test method describes the standardized procedure for measuring the electrical conductivity of water and wastewater, which reflects the sample’s ability to conduct electrical current due to the presence of dissolved ionic species (such as salts, acids, and bases). Conductivity is a key indicator of total dissolved solids (TDS) and overall water quality.
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]
The FDA’s Bacteriological Analytical Manual (BAM) method for Bacillus cereus outlines procedures for the detection and enumeration of this spore-forming, foodborne pathogen in foods, ingredients, and environmental samples. B. cereus is known to cause diarrheal and emetic (vomiting) illnesses and is commonly associated with starchy or protein-rich foods such as rice, dairy, and meat products.
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.