In the international standard classification, po43 involves: Vocabularies.
Professional Standard - Environmental Protection, po43
HJ 84-2016 Water Quality-Determination of Inorganic Anions（F-、Cl-、NO2-、Br-、NO3-、PO43-、SO32-、SO42-）-Ion Chromatography
HJ 799-2016 Determination of water-soluble anions (F-, Cl-, Br-, NO2-, NO3-, PO43-, SO32-, SO42-) in ambient air particulate matter by ion chromatography