diff --git a/config/chmo.iris b/config/chmo.iris
index 0896c9f3..8b3b1e61 100644
--- a/config/chmo.iris
+++ b/config/chmo.iris
@@ -18,3 +18,5 @@
 +(http://purl.obolibrary.org/obo/OBI_0000070):http://purl.obolibrary.org/obo/CHMO_0000373 Transmission electron microscopy with electron energy loss spectroscopy
 +(http://purl.obolibrary.org/obo/OBI_0000070):http://purl.obolibrary.org/obo/CHMO_0000207 Wide-Angle X-ray Scattering
 +(http://purl.bioontology.org/ontology/npo#NPO_1710):http://purl.obolibrary.org/obo/CHMO_0000305 X-ray absorption near edge spectroscopy
++(http://purl.bioontology.org/ontology/npo#NPO_1710):http://purl.obolibrary.org/obo/CHMO_0000305 X-ray absorption near edge spectroscopy
++(http://purl.bioontology.org/ontology/npo#NPO_1468):http://purl.obolibrary.org/obo/CHMO_0002928 Temperature programmed surface reaction spectroscopy
\ No newline at end of file