Nutrient minerals are chemical elements required by organisms for the functions of life. These elements include the major minerals for humans such as calcium, phosphorus, potassium, sodium and magnesium and minor elements such as sulfur, iron, chlorine, cobalt, copper, zinc, manganese, molybdenum, iodine, and selenium. Spex provides standards for all the major and trace elements considered to be nutrients.
Essential Minerals and Nutrients Brochure
Ironing Out the Elements: Essential Nutrients Technical Paper