Table 4: (a) Measured (from slope) and certified/reference concentrations (mg kg−1) for the target analytes in the SRM 2976 mussel tissue. (b) Measured (from slope) and certified/reference concentrations (mg kg−1) for the target analytes in the SRM 1549 nonfat milk powder. (c) Measured (from slope) and certified/reference concentrations (mg kg−1) for the target analytes in the SRM 1573a tomato leaves.
(a)

Element SRM 2976 mussel tissue
From slopecertified/referenceStat.

Be9N.L.
B11 Aa
Al27 R Ab-Ca
Ti49 Aa
V51 Ab
Cr52 R Ab-Ca
Mn55 R Aa-Ca
Fe56 C Aa-Cb
Co59 R Aa-Ca
Ni60 R Ab-Ca
Cu65 C Ab-Ca
Zn66 C Aa-Ca
As75 C Aa-Ca
Se82 C Aa-Cb
Sr88 R Aa-Cb
Mo98 Ab
Ag107N.L.; <MDLR
Cd111 C Aa-Ca
Sb123N.L.
Cs133N.L.; <MDLR
Ba1370.65
Tl205N.L.
Pb208 C Aa-Ca
Th232 R Bb-Ca
U238 Aa

Statistical analysis: first (capital) refers to linear fit: A > 99% CL, B > 95% CL; C > 90% CL. Second (lower case) refers to the ordinate in origin: not significantly different from zero at 99% CL; b, else. Third refers to the comparison between measured and certificated/reference values: Ca not statistically significant difference at 95% CL, Cb, else. For those reference values without associated uncertainties, relative errors of 20% have been assumed.
N.L: nonpositive linear relationship; <MDL: below method detection limit;
R: reference value; C: certified value.
(b)

Element SRM 1549 nonfat milk powder
From slopecertified/referenceStat.

Be9N.L.
B11 Ba
Al27N.L.; <MDLR2.0
Ti49 Aa
V51N.L.
Cr52N.L.; <MDLC
Mn55 C Ab-Ca
Fe56N.L.; <MDLC
Co59<MDLR0.0041
Ni60 Ab
Cu65 C Ca-Ca
Zn66 C Aa-Ca
As75<MDLR0.0019
Se82<MDLC
Sr88 Aa
Mo98 R0.34Aa-Ca
Ag107<MDLR<0.0003
Cd111<MDLC
Sb123<MDLR0.00027
Cs133N.L.
Ba137 Aa
Tl205N.L.; <MDL
Pb208<MDLC
Th232N.L.
U238N.L.

Statistical analysis: first (capital) refers to linear fit: A > 99% CL; B > 95% CL; C > 90% CL. Second (lower case) refers to the ordinate in origin: not significantly different from zero at 99% CL; b, else. Third refers to the comparison between measured and certificated/reference values: Ca not statistically significant difference at 95% CL, Cb, else. For those reference values without associated uncertainties, relative errors of 20% have been assumed.
N.L: nonpositive linear relationship; <MDL: below method detection limit;
R: reference value; C: certified value.
(c)

Element SRM 1573a tomato leaves
From slopecertified/referenceStat.

Be9 Ab
B11 Aa
Al27 C Aa-Cb
Ti49 Aa
V51 C Ab-Cb
Cr52 C Ab-Cb
Mn55 C Aa-Ca
Fe56 C Ab-Cb
Co59 C Aa-Cb
Ni60 C Ab-Cb
Cu65 C Aa-Cb
Zn66 C Aa-Ca
As75 C Ab-Cb
Se82<MDLC
Sr88 R85Aa-Ca
Mo98 Aa
Ag107 R0.017Aa-Ca
Cd111 C Aa-Ca
Sb123 C Aa-Cb
Cs133 R0.053Ab-Ca
Ba137 R63Aa-Ca
Tl205 Aa
Pb208 Aa
Th232 R0.120Aa-Ca
U238 R0.035Aa-Ca

Statistical analysis: first (capital) refers to linear fit: A > 99% CL; B > 95% CL; C > 90% CL. Second (lower case) refers to the ordinate in origin: not significantly different from zero at 99% CL; b, else. Third refers to the comparison between measured and certificated/reference values: Ca not statistically significant difference at 95% CL, Cb, else. For those reference values without associated uncertainties, relative errors of 20% have been assumed.
N.L: nonpositive linear relationship; <MDL: below method detection limit;
R: reference value; C: certified value.