Validation and quality assurance applied to goat milk chemical composition: Minerals and trace elements measurementsValidation et assurance qualité appliquée à la composition chimique du lait de chèvre : mesures des minéraux et éléments traces.

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Table III.

Performance characteristics of calibration functions.

Element	Concentration range (mg·L⁻¹)	Absorbance range	TV	V_xo	C_LOD (mg·L⁻¹)	C_LOQ (mg·L⁻¹)
Na	0.02–0.3	0.02–0.21	12.2	0.03	0.008	0.02
K	0.02–0.5	0.02–0.20	7.2	0.02	0.008	0.02
Ca	0.02–4.0	0.03–0.25	2.8	0.03	0.07	0.2
Mg	0.02–0.2	0.08–0.28	34.1	0.02	0.008	0.02
Zn	0.02–0.4	0.02–0.18	0.1	0.03	0.007	0.02
Fe	0.1–1.0	0.02–0.11	1.2	0.05	0.03	0.10
Mn	0.025–0.50	0.01–0.11	1.1	0.01	0.001	0.004
P	0.05–1.0	0.06–0.86	278	0.11	0.01	0.03
Element	Concentration range (μg·L⁻¹)	Absorbance range	TV	V_xo	C_LOD (μg·L⁻¹)	C_LOQ (μg·L⁻¹)
Cr	0.25–2.5	0.02–0.12	−2.8	0.07	0.1	0.3
Mo	1–10	0.02–0.12	0.2	0.07	0.4	1.0
Ni	1–10	0.02–0.07	1.7	0.04	0.3	1.0
Cu	1–20	0.02–0.30	−2.4	0.04	0.37	1.0
Cd	0.1–1.5	0.02–0.22	−3.0	0.05	0.04	0.1
Co	0.5–7.5	0.02–0.18	−2.8	0.08	0.2	0.6
Pb	1–7.5	0.02–0.10	−3.0	0.10	0.5	1.0

TV, testing value for linearity evaluation ; V_xo, relative variation coefficient [16, 17]; N, number of calibration data pairs; C_LOD, limit of detection and C_LOQ, limit of quantification (both expressed as concentration of the elements in the milk digestion solutions).