Water (chemical formula: H2O) is an inorganic substance composed of two elements: hydrogen and oxygen. It is a colorless and odorless transparent liquid at room temperature and pressure. Water is one of the most common substances on Earth, an important resource for the survival of all life, including humans, and also the most important component of living organisms

Water quality testing scope:

Domestic drinking water, well water, bottled purified drinking water, purified drinking water, groundwater, natural mineral water, chemical treatment agents for drinking water, bottled (barrel) drinking water, analytical laboratory water, industrial boiler water, boiler water and cooling water, steam water from thermal power plants, agricultural irrigation water, fishery water, surface water, freshwater aquaculture water, seawater aquaculture water, livestock and poultry drinking water Water for processing livestock and poultry products, electronic grade water, seawater, precipitation, etc

Testing items:

1. Drinking water testing items:

(1) Sensory properties chemical indicators: chromaticity, turbidity, odor and taste, visible to the naked eye, pH, aluminum, iron, manganese, copper, zinc, chloride, sulfate, total dissolved solids, total hardness, oxygen consumption, volatile phenols, anionic synthetic detergents

Toxicological indicators: arsenic, cadmium, chromium, mercury, selenium cyanide, fluoride, nitrate, trichloromethane Carbon tetrachloride, bromate, formaldehyde, chlorite, chlorate

(2) Microbial indicators: total coliform group, heat-resistant coliform group, Escherichia coli, pathogenic bacteria, total bacterial count

(3) Radioactivity indicators: total α Radioactivity, total β Radioactivity

2. Industrial water testing items:

(1) Microorganisms: total bacterial count, coliform group, mold, yeast, Salmonella, Shigella, Escherichia coli, Vibrio parahaemolyticus, Staphylococcus aureus, Streptococcus hemolyticus, Clostridium perfringens, Bacillus cereus, Listeria monocytogenes, Legionella, Vibrio cholerae, Enterobacter sakazakii, Campylobacter jejuni Pseudomonas aeruginosa, Enterococcus, etc.

(2) Sensory traits: color, turbidity, odor and taste, visible to the naked eye

(3) Physical indicators: pH value, conductivity, total hardness, total dissolved solids, volatile phenols, anionic synthetic detergents, etc.

(4) Comprehensive indicators: oxygen consumption, biochemical oxygen demand, total organic carbon, etc.

(5) Metal elements: beryllium, lead, cadmium, chromium, mercury, thallium, potassium, calcium, sodium, magnesium, etc.

(6) Inorganic non-metals: sulfate, chloride, chlorate, chlorite, fluoride, nitrate nitrogen, sulfide, phosphate, boron, ammonia nitrogen, nitrite, iodide, bromate, etc.

(7) Organic compounds: benzene, xylene, benzopyrene, bisphenol A, formaldehyde, carbon tetrachloride, dichlorodibromomethane, dichloromethane, trichloroethylene Tetrachloroethylene, tribromomethane, di (2-ethylhexyl) phthalate, etc.

3. Other water sample testing items:

(1) Industrial boiler water: suspended solids, dissolved oxygen, total hardness, dissolved solids, sulfate, phosphate, relative alkalinity, iron content, chloride ion content, oil content, pH value, etc.

(2) Industrial wastewater: conductivity, transparency, pH value, total salt content, total hardness, chromaticity, turbidity, suspended solids Acidity, alkalinity, hexavalent chromium, total mercury, copper, zinc, lead, cadmium, nickel, iron, manganese, beryllium, total chromium, potassium, sodium, calcium, magnesium, etc.

(3) Agricultural irrigation water: biochemical oxygen demand (BOD5), chemical oxygen demand (CODcr), suspended solids, anionic surfactants (LAS), Kjeldahl nitrogen total phosphorus (calculated as P), water temperature, pH value, total salt content, chloride, sulfide, total mercury, total cadmium, total arsenic, chromium (hexavalent), total lead Total copper, total zinc, total selenium, fluoride, petroleum, volatile phenols, benzene, trichloroacetaldehyde, acrolein, boron, fecal coliform count, roundworm eggs, etc