The products of the AOx-based O2-scavenger are aldehydes resulting from the oxidation of the primary alcohols or formic acid resulting from the oxidation of formaldehyde when paraformaldehyde (or methanol) is used as substrate. The influence of the products on the activity of GOx was monitored by recording the catalytic current for glucose oxidation over time in an electrolyte containing glucose, GOx, Fc(MeOH)2 and the AOx-based O2-scavenging system. After 3 h, the catalytic current decreased only slightly when using alcohols as substrate