Results of the sulfide determination in artificial and real samples.
| Samples | Sulfide concentration, μg L−1 ± confidence interval (n = 5, P = 0.95) | Recovery (%) | |
|---|---|---|---|
| Added | Found | ||
| Artificial samplesa | 30 | 29.4 ± 1.4 | 97.9 |
| 60 | 62.3 ± 3.6 | 103.9 | |
| Tap water 1 | — | N.d.b | — |
| 60 | 58.4 ± 2.4 | 97.4 | |
| 188 | 192 ± 13 | 102.1 | |
| Tap water 2 | — | N.d. | — |
| 15 | 13.8 ± 1.8 | 92.0 | |
| 30 | 29.4 ± 0.7 | 98.0 | |
| River water | — | N.d. | — |
| 30 | 31.2 ± 2.1 | 104.2 | |
| 60 | 61.7 ± 2.0 | 102.9 | |
| Wine | — | N.d. | — |
| 144 | 140 ± 10 | 97.2 | |
a
Composition of artificial sample: 8 μM KI; 8 μМ KSCN; 0.5 mM CaCl2; 1 mM KBr, 1 mM Na2CO3; 2 mM KNO3; 0.01 M MgSO4.
b
N.d. – not detected.