Table 1

True [Ng/Ml]	Measured [Ng/Ml]	Diff %
2.95	2.91	1.37
3.61	3.6	0.28
1.22	1.2	1.67
0.454	0.437	3.89
0.15	0.154	-2.60
0.38	0.385	-1.30
1.63	1.51	7.95
4.35	4.52	-3.76
6.89	6.76	1.92
0.348	0.34	2.35
0.354	0.389	-9.00
10.000	10.6	-5.66
0.360	0.336	7.14
2.200	2.14	2.80
0.083	0.085	-2.35
7.610	7.58	0.40
2.130	2.140	-0.47
1.470	1.390	5.76
2.440	2.430	0.41
0.891	0.879	1.37
0.778	0.757	2.77

Table 1:Nanoparticle pre-processing step passed the concentration method verification test in our laboratory, N=21. TRUE = true value of HGH concentration in the standard sample, MEASURED = HGH concentration measured in the standard sample in a blind fashion, DIFF% = (MEASURED - TRUE)/TRUE *100. Acceptability criteria = DIFF% < 10%.