Table 2 Recovery of SERS ICSs for detecting haemoglobin and Cd2+
Analytes | Samples | Spiked concentrations (ng/mL) | Detected by SERS ICSs (ng/mL) | Recovery of ICS (%)b | Coefficient of variation (%)c | Detect by ELISA/ICP-MASS (ng/mL) |
|---|---|---|---|---|---|---|
Haemoglobin | Stool processed solution | 1000 | 840 ± 125 | 84 | 14.8 | 920.3 ± 53.3 |
800 | 751 ± 38 | 93.9 | 5.06 | 810 ± 61 | ||
200 | 183 ± 14 | 91.5 | 7.65 | 188.6 ± 11.3 | ||
50 | 47 ± 3.2 | 94 | 6.8 | 46.6 ± 3.9 | ||
Serum | 1000 | 1090 ± 60.4 | 109 | 5.54 | 990 ± 44.6 | |
500 | 518 ± 18.2 | 103.6 | 3.51 | 481.4 ± 38.4 | ||
100 | 111 ± 9.1 | 111 | 8.2 | 99.5 ± 7.3 | ||
Cd2+ | Pearl river water | 250 | 246.7 ± 4.4 | 98.68 | 1.78 | 226.7 ± 40.4 |
50 | 54.3 ± 8.1 | 108.67 | 14.99 | 54.3 ± 8.1 | ||
10 | 11.0 ± 2.6 | 110.00 | 24.05 | 11.0 ± 2.6 | ||
2 | 1.9 ± 0.2 | 92.50 | 11.78 | 1.9 ± 0.2 | ||
Tap water | 250 | 246.7 ± 10.0 | 96.00 | 4.17 | 246.7 ± 10.0 | |
50 | 55.0 ± 6.6 | 110.00 | 11.92 | 55.0 ± 6.6 | ||
10 | 12.0 ± 1.7 | 120.00 | 14.43 | 12.0 ± 1.7 | ||
2 | 2.1 ± 0.2 | 106.67 | 10.83 | 2.1 ± 0.2 | ||
Soil leaching water | 250 | 230.0 ± 26.5 | 92.00 | 11.50 | 230.0 ± 26.5 | |
50 | 58.0 ± 2 | 116.00 | 3.45 | 58.0 ± 2 | ||
10 | 10.3 ± 2.5 | 103.33 | 24.35 | 10.3 ± 2.5 | ||
2 | 2.1 ± 0.2 | 105.83 | 11.65 | 2.1 ± 0.2 |