Table Info

Table 2.

Figures of merit

Elements	LOD (µg/L)	LOQ (µg/L)	Work range (µg/L)	Repeatability (RSD, %)	Recovery (%)	Uncertainty⁽¹⁾ (%)	EQC (Ζ-score)
As	0.06	0.21	0.25–2.5	≤ 8.3	89–119	21–25	–0.1
Cd	0.03	0.09	0.25–2.5	≤ 5.6	93–117	20–25	–1.0
Co	0.06	0.19	0.25–2.5	≤ 5.4	87–107	18–23	0.2
Cr	0.13	0.42	0.5–5.0	≤ 10	94–102	20–28	1.9
Cu	0.11	0.35	0.5–5.0	≤ 8.3	93–104	16–20	0.9
I	0.27	0.90	1–10	≤ 8.4	89–111	17–27	–0.1
Li	0.06	0.19	0.25–2.5	≤ 8.4	100–114	26	n.a.
Mn	0.12	0.42	0.5–5.0	≤ 8.0	88–112	22–26	0.7
Mo	0.10	0.34	0.5–5.0	≤ 7.0	104–120	21–30	0.2
Pb	0.11	0.37	0.5–5.0	≤ 3.2	93–114	22–32	–0.5
Se	0.13	0.44	0.5–5.0	≤ 7.8	84–107	21–24	0.1
Sr	0.12	0.41	0.5–5.0	≤ 7.6	95–117	20–23	n.a.
Zn	1.1	3.7	5–50	≤ 9.8	81–99	22–29	–0.8

⁽¹⁾ Expanded uncertainty (coverage factor of 2). EQC: external quality control; LOD: limit of detection; LOQ: limit of quantification; n.a.: not available; RSD: relative standard deviation

Declarations

Acknowledgments

Strategic projects UIDB/04292/2020 (https://doi.org/10.54499/UIDB/04292/2020) and UIDP/04292/2020 (https://doi.org/10.54499/UIDP/04292/2020) granted to MARE—Marine and Environmental Sciences Centre, and the project LA/P/0069/2020 (https://doi.org/10.54499/LA/P/0069/2020) granted to the Associate Laboratory ARNET—Aquatic Research Network.

The authors also thank the colleagues of INSA’s Department of Food and Nutrition, Ana Serôdio, Andreia Lopes, Elsa Vasco, and Maria Graça Dias, for defining the sample list and executing the collection of samples.

Author contributions

SG, AR, ID, MV: Conceptualization, Investigation, Writing—original draft, Writing—review & editing. IC: Conceptualization, Investigation, Writing—original draft, Writing—review & editing, Supervision. All authors read and approved the submitted version.

Conflicts of interest

The authors declare that they have no conflicts of interest.

Ethical approval

Not applicable.

Consent to participate

Not applicable.

Consent to publication

Not applicable.

Availability of data and materials

Data from the present manuscript will be made available upon request.

Funding

Not applicable.

Copyright

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