Standards/32 kinds of metals mixed standard/aluminum, arsenic, gold, boron, barium, calcium, cadmium, cobalt, chromium, copper, iron, mercury, iridium, potassium, lithium, magnesium, manganese, molybdenum, sodium, nickel, lead, palladium, platinum, rhodium, ruthenium, antimony, selenium, tin, thallium, vanadium, tungsten, zirconium