Typical diet - Trace elements A unit of NIST-1548a consists of two bottles, each containing approximately 6.5 g of the freeze-dried homogenate of mixed diet foods. Certified values Al.............................. 72.4 mg/kg Cu ............................. 2.32 mg/kg Ni ........................... 0.369 mg/kg As............................. 0.20 mg/kg Fe ............................. 35.3 mg/kg P ............................. 3486 mg/kg Ca ........................... 1967 mg/kg I .............................. 0.759 mg/kg S ............................. 1928 mg/kg Cd .......................... 0.035 mg/kg Mg ............................. 580 mg/kg Se .......................... 0.245 mg/kg Cl .......................... 12078 mg/kg Mn ............................ 5.75 mg/kg Sn ............................ 17.2 mg/kg Cs ........................ 0.0098 mg/kg Na ............................ 8132 mg/kg Zn ............................. 24.6 mg/kg Indicative values for Ash, carbohydrate, fat, N, protein, dietary fibre, calories, B, Ba, Br, Co, Hg, Mo, Sb, Sc, Si, Sr,