# Modified porous silica layer — GC column stationary phase cross-reference by manufacturer For Modified porous silica layer, agilent equivalents is GS-GasPro; varian/chrompack equivalents is CP-SilicaPLOT, verified against its source on 2026-08-15. - **Phase chemistry:** Modified porous silica layer _(verified: appears in the quote below)_ - **Agilent equivalents:** GS-GasPro _(verified: appears in the quote below)_ - **Varian/Chrompack equivalents:** CP-SilicaPLOT _(verified: appears in the quote below)_ ## What the source says > GsBP-PLOT GasPro Modified porous silica layer | GS-GasPro | – | – | – | – | – | CP-SilicaPLOT | ## Source - https://gs-tek.com/gc-column-cross-reference/ Last verified: 2026-08-15. Review by: 2027-08-15. Part of [GC column stationary phase cross-reference by manufacturer](https://referencesource.org/lab-instrument-consumables-equivalence/).