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Elemental concentration present in certified standard samples (Orchard leaves -SRM 1571).
| Element | Certified | Current Work | Recovery (%) |
|---|---|---|---|
| Ca | 20,900 ± 300 | 19,700 ± 600 | 94 |
| Cu | 12 ± 1.0 | 13 ± 1.0 | 108 |
| Fe | 300 ± 20 | 278 ± 7 | 93 |
| K | 14,700 ± 300 | 14,000 ± 400 | 95 |
| S | 2300 * | 2090 | |
| Sr | 37 * | 39 | |
| Zn | 25 ± 3 | 23 ± 2 | 92 |
(*) Values obtained by noncertified methods.
