The Supelclean and Supeclean ENVI SPE product line was developed, highly tested and quality controlled for environmental and industrial applications. Over 10 different phase chemistries are available ranging from our unique ENVI-Carb (graphitized carbon black) to our dual-layer SPE technology for multi-residue pesticide analysis. Select products are available in glass tubes, PTFE, and stainless steel frit configurations for EPA compliance.