Microorganisms for scientific or research use in analyzing potable water, wastewater, sewage and effluents; chemicals, namely ammonium salts, magnesium salts, potassium salts, sodium salts including phosphates, sodium hexametaphosphate, ammonium chloride and magnesium sulphate, glucose solutions, glutamic acid, biological oxygen demand (BOD) standard solutions and pH buffer solutions for use in analyzing, measuring and monitoring equipment in the field of water quality monitoring including po...