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Validation parameters of the methods used for the determination of microelements.
| Microelement/method | Dilution factor | Recovery of the CRM (%) | Detection limit | Accuracy (%) | Precision (coefficient of variation) (%) |
|---|---|---|---|---|---|
| Cu/FAAS | 25 | 95 | 0.158 ppm | 2.2 | 5.1 |
| Zn/FAAS | 250 | 101 | 0.013 ppm | 1.3 | 2.1 |
| Mn/ET AAS | 125 | 98 | 0.084 ppb | 1.2 | 2.1 |
| Se/ETAAS | 25 | 99 | 1.74 ppb | 0.4 | 1.9 |
FAAS: flame atomic absorption spectrometry; ETAAS: electrothermal atomic absorption spectrometry; ppm: µg/g; ppb: ng/g.
