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Comparison of As concentrations determined by the AgSCSN(CH2CH3)2 and GFAAS methods.
| Measure | Result |
|---|---|
| Calculated t | 2.63 |
| Critical two-tailed t at α = 0.05 (70 df) | 1.99 |
| p-Value of paired t-test | 0.01 |
| Correlation coefficient, r | 0.995 |
| Mean As concentration by AgSCSN(CH2CH3)2 | 23.4 μg/L |
| Mean As concentration by GFAAS | 28.6 μg/L |
| Relative percent difference of these means | 20.1% |
