Inter-day Conc. (ng/band) (n=3) Mean ± SD %RSD 800 1557.65 ± 4.73 0.304 1200 2510.9 ± 17.3 0.692 1600 3579.6 ± 4.80 0.134 Inter-day Conc. (ng/band) (n=3) Mean ± SD %RSD 800 1663.13 ± 2.00 0.120 1200 2333.43 ± 1.24 0.053 1600 3578.23 ± 1.88 0.054

Table 1: Intra-day.