Table 1.

The stability of SeNPs-C/C against temperature, humidity and light (n = 3)

Test type	Storage conditiona	Storage time	Se content (mg kg−1)	Se 3d peak (eV)
No test	–	0 day	10.6 ± 0.3	55.2
Stress testing	60 ± 1 °C, 40 ± 5% RH, dark	10 day	11.0 ± 0.2	55.3
	25 ± 1 °C, 80 ± 5% RH, dark	10 day	10.5 ± 0.8	55.3
	25 ± 1 °C, 40 ± 5% RH, 5000 ± 500 Lx	10 day	10.6 ± 0.1	55.3
Accelerated testing	40 ± 2 °C, 75 ± 5% RH, dark	1 month	10.7 ± 0.2	55.3
		2 month	10.6 ± 0.4	55.2
		3 month	10.7 ± 0.3	55.2
		6 month	10.2 ± 0.2	55.2

^aAfter individual treatment, each sample was dried to constant weight at 60 °C before Se content determination and XPS Se 3d scanning

RH, relative humidity