Table A3.

Repeatability, reproducibility and calculated measurement uncertainty for the analysis of the Au nanoparticles. The results are calculated for each individual and independent sample, even if they are analyzed on the same day. The number concentration is given as measured in the diluted suspension.

Nanoparticle	Sample No.	$\mathit{C}/{\mathbf{L}}^{-1}$	${\mathit{S}}_{\mathit{r}}/\%$	${\mathit{S}}_{\mathit{R}}/\%$	${\mathit{u}}_{\mathit{x}}/\%$
Au10	No results available
Au30	sample1	$\mathrm{21,708,695}$	$4.2$	$4.2$	$5.9$
Au30	sample2	$\mathrm{23,460,847}$	$3.9$	$5.8$	$7.0$
Au30	sample3	$\mathrm{24,990,657}$	$5.9$	$8.4$	$10.3$
Au60	sample1	$\mathrm{54,387,268}$	$4.0$	$8.5$	$9.4$
Au60	sample2	$\mathrm{53,548,685}$	$4.7$	$9.2$	$10.4$
Au60	sample3	$\mathrm{54,755,625}$	$3.8$	$9.0$	$9.8$
Au100	sample1	$\mathrm{24,226,290}$	$6.9$	$9.7$	$11.9$
Au100	sample2	$\mathrm{23,233,060}$	$6.2$	$10.8$	$12.5$
Au100	sample3	$\mathrm{23,608,430}$	$5.5$	$5.8$	$8.0$
Au250	sample1	$\mathrm{19,283,619}$	$5.8$	$6.8$	$8.9$
Au250	sample2	$\mathrm{18,279,107}$	$7.7$	$7.9$	$11.0$
Au250	sample3	$\mathrm{18,046,224}$	$6.0$	$6.8$	$9.1$
Au500	sample1	$\mathrm{10,759,624}$	$7.5$	$9.6$	$12.1$
Au500	sample2	$\mathrm{10,253,584}$	$10.1$	$10.8$	$14.8$
Au500	sample3	$\mathrm{10,194,237}$	$19.3$	$20.2$	$28.0$