This is a multielement solution that was prepared gravimetrically to contain the elements and concentrations stated below.

Phosphorus (P) 99.5-100.5 ppm
Potassium (K) 99.5-100.5 ppm
Aluminum (Al) 9.95-10.05 ppm
Chromium (Cr) 9.95-10.05 ppm
Calcium (Ca) 19.9-20.1 ppm
Sodium (Na) 19.9-20.1 ppm
Magnesium (Mg) 19.9-20.1 ppm
Antimony (Sb) 9.95-10.05 ppm
Selenium (Se) 9.95-10.05 ppm
Zinc (Zn) 9.95-10.05 ppm
Copper (Cu) 9.95-10.05 ppm
Cadmium (Cd) 9.95-10.05 ppm
Beryllium (Be) 9.95-10.05 ppm
Arsenic (As) 9.95-10.05 ppm
Thallium (Tl) 9.95-10.05 ppm
Nickel (Ni) 9.95-10.05 ppm
Lead (Pb) 9.95-10.05 ppm
Iron (Fe) 9.95-10.05 ppm

The uncertainty associated with the certified values is ± 0.5% relative.

The concentrations are confirmed by ICP or ICP-MS.