The sources of electroplating wastewater generally include plating cleaning water, waste electroplating solution, and other wastewater, including flushing the workshop floor, as well as various tank fluids and drainage caused by "running, emitting, dripping, and leaking" due to plating tank leakage or improper operation and management. The water quality of  electroplating  wastewater  is  complex,  and  its  components  vary  greatly,  depending  on  the  plating  process, pre-treatment process, and factory management level.

Ion chromatography can effectively detect anions and cations in electroplating wastewater, providing data support for the limit of wastewater discharge in electroplating enterprises, and monitoring methods for the reprocessing process of electroplating wastewater. This article will detect anions in wastewater.