Biological reference materials are listed below. Elemental analysis was performed via ICP-OES and ICP-MS. Arsenic Speciation was done via HPLC-ICP-MS.

SLE1604RM-Eucalyptus Leaf SL1806QC-Spinach* SL1807QC-Rice* SL1808QC-Wheat*
25 g 50 g 50 g 50 g
Element Unit - - - -
Ag, Silver ppm 0.007 0.008 0.007 0.003
Al, Aluminium ppm 224 390 5 3.0
As (total), Arsenic ppm 0.34 0.100 0.080 <10 ppb
As(III), Arsenite ppm - 0.047 0.048 -
As(V), Arsenate ppm - 0.044 0.017 -
DMA, Dimethylarsonate ppm - 0.008 0.010 -
MMA, Methylarsonate ppm - ND ND -
Au, Gold ppm 0.010 <0.05 ppb <0.05 ppb <0.05 ppb
B, Boron ppm 20.75 31.5 4 4
Ba, Barium ppm 83.45 15.3 0.84 1.5
Be, Beryllium ppm 0.034 0.015 <0.5 ppb <0.5 ppb
Bi, Bismuth ppm 0.070 0.005 <5 ppb <5 ppb
Br, Bromine ppm 9.29 44.3 0.8 3.0
Ca, Calcium ppm 14500 12963 39 247
Cd, Cadmium ppm 0.12 0.88 0.009 0.011
Ce, Cerium ppm 2.078 0.67 0.006 0.002
Co, Cobalt ppm 0.28 0.23 0.046 0.134
Cr, Chromium ppm 0.8 1 0.43
Cs, Cesium ppm 0.080 0.07 0.032 0.007
Cu, Copper ppm 6.37 15.85 2.2 2.9
Dy, Dysprosium ppm 0.152 0.036 <0.5 ppb <0.5 ppb
Er, Erbium ppm 0.067 0.019 <0.2 ppb <0.2 ppb
Eu, Europium ppm 0.046 0.012 <0.5 ppb <0.5 ppb
Fe, Iron ppm 282 365 78 81
Ga, Gallium ppm 0.1 0.13 0.007 0.020
Gd, Gadolinium ppm 0.229 0.05 <0.5 ppb <0.5 ppb
Hf, Hafnium ppm 0.003 0.002 <0.5 ppb <0.5 ppb
Hg, Mercury ppm 0.030 0.009 0.002 <0.5 ppb
Ho, Holmium ppm 0.030 0.007 <0.1 ppb <0.1 ppb
I, Iodine ppm - 0.155 4 2.5
In, Indium ppm 0.002 <5ppb <0.5 ppb <0.5 ppb
K, Potassium ppm 7145 45451 695 3137
La, Lanthanum ppm 1.400 0.320 0.003 0.001
Li, Lithium ppm 0.57 1.00 <5 ppb <5 ppb
Lu, Lutetium ppm 0.009 0.003 <0.5 ppb <0.1 ppb
Mg, Magnesium ppm 1700 4465 147 701
Mn, Manganese ppm 1084 71.0 7.6 28.4
Mo, Molybdenum ppm 0.095 0.63 0.36 0.11
Na, Sodium ppm 1110 4090 <5 ppm 18.7
Nb, Niobium ppm 0.020 0.058 0.002 0.002
Nd, Neodymium ppm 1.147 0.288 0.003 0.002
Ni, Nickel ppm 5.8 1.44 87.8 53.2
P, Phosphorus ppm 1020 3819 427 1573
Pb, Lead ppm 2.09 0.22 0.05 0.04
Pd, Palladium ppm - <0.1 ppb <0.5 ppb <0.5 ppb
Pr, Promethium ppm 0.275 0.07 <5 ppb <0.5 ppb
Pt, Platinum ppm - <0.1 ppb <0.1 ppb <0.1 ppb
Rb, Rubidium ppm 6.67 10.8 7.0 4.5
Re, Rhenium ppm - <0.5ppb <0.5 ppb <0.1 ppb
S, Sulfur ppm - 2836 729 1231
Sb, Antimony ppm 0.065 0.014 0.017 0.009
Sc, Scandium ppm 0.092 0.114 <5 ppb <5 ppb
Se, Selenium ppm 0.050 0.22 0.022 0.078
Sm, Samarium ppm 0.227 0.061 <0.5 ppb <0.5 ppb
Sn, Tin ppm 0.19 0.043 0.013 0.011
Sr, Strontium ppm 37.2 63.34 0.262 2.50
Ta, Tantalum ppm 0.002 <5ppb <0.5 ppb <0.5 ppb
Tb, Terbium ppm 0.029 0.007 <0.5 ppb <0.5 ppb
Te, Tellurium ppm 0.063 <5ppb <0.5 ppb <0.5 ppb
Th, Thorium ppm 0.075 0.065 <5 ppb <0.5 ppb
Ti, Titanium ppm 7.19 11.70 <0.1 ppm 0.25
Tl, Thallium ppm 0.037 0.021 <0.5 ppb <0.5 ppb
Tm, Thulium ppm 0.010 0.003 <0.1 ppb <0.1 ppb
U, Uranium ppm 0.020 0.030 <0.5 ppb <0.5 ppb
V, Vanadium ppm 0.46 0.77 <0.1 ppm <0.1 ppm
W, Tungsten ppm 0.030 0.017 0.119 0.120
Y, Yttrium ppm 1.025 0.19 <5 ppb <5 ppb
Yb, Ytterbium ppm 0.057 0.018 <0.5 ppb <0.5 ppb
Zn, Zinc ppm 14.9 41.1 18.2 20.1
Zr, Zirconium ppm 0.34 0.100 0.004 0.006