RayKol1
https://www.raykolgroup.com/application-of-solid-phase-extraction-in-environmental-sample-analysis.html
Given the many advantages of solid phase extraction over traditional solution extraction, this technology is being increasingly used in various fields, including environmental analysis, food, pharmaceuticals, clinical research, and industrial production. The United States Environmental Protection Agency has also included it in many methods of pollutant analysis. In recent years, the use of automated solid phase extraction equipment in environmental analysis has also been increasing, with involvement in the analysis of environmental samples such as water, air, soil, and sediments.