Table 3. Summary of Changes in H₂O₂ Equivalents from Figure 4^a.

Cu NPs (μg/mL)	added H2O2 (μM)	first data point (μM)	change first to last data point (%)	change first to last data point (μM)	time (min)
100	0	291	–36	–104	60
100	1000	523	–53	–278	2
20	0	1.9	+26	+0.5	10
20	2.5	5.3	–60	–3.2	10
20	5	7.8	–76	–5.9	10
20	50	33.0	–90	–28.9	10
20	100	76.3	–96	–73.5	10

^aThe added (theoretical) concentration of H₂O₂ differed from that of the measured H₂O₂ equivalent at the first data point. This is due to rapid reactions taking place prior to the first data collection; these could be both formation and degradation of H₂O₂.