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.

Free Access

Table IV.

Validation and quality assurance report.

Parameter	Precision			Trueness	w_LOD (mg·kg⁻¹)	w_LOQ (mg·kg⁻¹)	Uncertainty
	RSD_R	RSD_Horwitz	Horrat_R
Na	0.026	0.046	0.6	1.01 ± 0.03^a	20	60	0.04	0.10
K	0.022	0.037	0.6	0.96 ± 0.01^a	20	60	0.03	0.10
Ca	0.025	0.038	0.7	1.06 ± 0.03^a	5.0	15	0.04	0.10
Mg	0.019	0.054	0.4	1.06 ± 0.06^a	5	15	0.06	0.10
P	0.024	0.039	0.6	1.01 ± 0.01^a	25	75	0.03	0.10
Cl	0.021	0.037	0.6	1.01 ± 0.02^a	0.03	0.1	0.03	0.10
Zn	0.030	0.093	0.3	0.99 ± 0.02^a	0.4	1.0	0.04	0.19
Fe	0.068	0.13	0.5	0.90 ± 0.07^a	0.04	0.11	0.11	0.19
Mn	0.036	0.16	0.2	0.93 ± 0.04^a	0.001	0.004	0.06	0.15
Cr	0.12	0.23	0.5	1.09 ± 0.11^c	0.0003	0.001	0.15	0.20
Cu	0.12	0.16	0.7	1.02 ± 0.02^a	0.001	0.004	0.10	0.18
Cu	0.12	0.16	0.7	0.96 ± 0.05^b	0.001	0.004	0.12	0.18
Mo	0.11	0.18	0.6	1.13 ± 0.10^c	0.001	0.004	0.13	0.20
Ni	0.087	0.31	0.3	0.83 ± 0.07^c	0.001	0.004	0.10	0.30
Cd	0.087	0.42	0.2	1.02 ± 0.07^b	0.0002	0.0006	0.11	0.22
Cd	0.087	0.42	0.2	1.11 ± 0.07^c	0.0002	0.0006	0.10	0.22
Co	0.087	0.34	0.3	0.87 ± 0.05^c	0.0007	0.002	0.10	0.26
Pb	0.087	0.28	0.3	1.01 ± 0.05^b	0.002	0.007	0.10	0.32
Pb	0.087	0.28	0.3	1.01 ± 0.05^c	0.002	0.007	0.10	0.32

RSD_R, relative standard deviation ; d₂ = 1.693for triplicates) [10]; RSD_Horwitz, relative standard deviation calculated by Horwitz formula RSD_Horwitz = 2^{(1−0.5logw)}; , standard uncertainty of given by , where values were calculated by equation (8) or (9); w_LOD, limit of detection (mass fraction); w_LOQ, limit of quantification (mass fraction); , relative combined uncertainty (equation (7)); , maximum standard uncertainty (equation (10)).

Data from Table V (CRM BCR – 063R).

Data from Table V (CRM BCR – 155).

Data from Table VI (spiked milk samples).