“…Titanium-porphyrins and cobalt-porphyrins as H2O2 catalysts have been used for the determination of glucose and H2O2 levels. [19][20][21] After the discovery of carbon nanotubes (CNTs), they were used for the determination of dopamine, [22][23][24][25][26][27][28][29][30] serotonin, 29,30 norepinephrine, 31 dihydronicotinamide adenine dinucleotide (NADH), [32][33][34] and ascorbic acid (AA), 35 because CNTs have excellent biocompatibility and electron transfer ability. Meanwhile, many papers have used CNTs modified with molecular derivatives or enzymes to measure glucose and H2O2.…”