Table 3.
Percentage elemental recoveries of SRM 1648a by ICP-MS after microwave-assisted acid digestion and their respective standard deviations shown in brackets for each digestion method carried out in this study and similar other studies.
| Element | Method 1 |
Method 2 |
Method 3 |
Celo et al., 2010 |
Celo et al., 2010 |
Kulkarni et al., 2007 |
|||
|---|---|---|---|---|---|---|---|---|---|
| 2.5 mL HNO3 | 2.5 mL HNO3, 3 μL HF, 24 μL H3BO3 | 2.5 mL HNO3, 30 μL HF, 240 μL H3BO3 | Conc HNO3 | 1.5 mL HNO3, 3 μL HF, 24 μL H3BO3 | 3 mL HNO3, 300 μL HF, 2.4 mL H3BO3 | ||||
| Na | 56.2 | (1.7) | 116.1 | (12.3) | 109.9 | (5.4) | 88 (7) | ||
| Mg | 101.1 | (2.8) | 90.5 | (0.7) | 89.0 | (2.1) | 101 (4) | ||
| Al | 60.8 | (0.1) | 88.8 | (3.7) | 91.4 | (1.6) | 26 (8) | 86 (10) | 104 (8) |
| Si | 13.9 | (24.5) | 27.1 | (66.6) | 2.5 | (37.8) | |||
| K | 39.4 | (0.5) | 72.5 | (0.6) | 74.3 | (0.8) | 95 (5) | ||
| Ca | 107.8 | (0.5) | 106.3 | (4.7) | 106.0 | (0.5) | |||
| Ti | 35.7 | (3.1) | 53.2 | (8.7) | 78.4 | (1.1) | 17 (15) | 73 (10) | 107 (4) |
| V | 87.3 | (0.4) | 93.9 | (0.6) | 96.2 | (0.6) | 70 (2) | 101 (6) | |
| Cr | 44.1 | (11.4) | 70.7 | (8.9) | 73.0 | (3.9) | 23 (1) | 56 (14) | 81 (8) |
| Mn | 92.8 | (0.5) | 98.6 | (1) | 101.2 | (1.3) | 84 (2) | 99 (7) | 96 (5) |
| Fe | 85.1 | (1.2) | 93.3 | (0.4) | 92.4 | (0.7) | 72 (1) | 92 (10) | 98 (4) |
| Ni | 66.5 | (7.7) | 75.9 | (10.9) | 77.2 | (18.8) | 76 (2) | 93 (10) | 99 (4) |
| Cu | 89.8 | (1) | 88.1 | (2.5) | 91.0 | (2.7) | 83 (1) | 91 (5) | 91 (7) |
| Zn | 90.7 | (4.5) | 85.5 | (8.4) | 77.0 | (2.4) | 94 (2) | 94 (4) | 101 (9) |
| As | 86.0 | (3.4) | 83.8 | (0.9) | 82.8 | (0.3) | 91 (1) | 102 (4) | 109 (7) |
| Sr | 122.3 | (5.9) | 101.0 | (4.7) | 99.0 | (4.1) | |||
| Cd | 82.7 | (0.5) | 84.3 | (0.1) | 83.2 | (0.7) | 91 (1) | 99 (5) | 112 (4) |
| Sb | 42.6 | (8) | 70.7 | (11) | 79.0 | (0.7) | 16 (11) | 101 (9) | 86 (3) |
| Pb | 90.0 | (0.9) | 87.6 | (1.7) | 83.8 | (0.1) | 94 (1) | 98 (4) | 108 (5) |