Chemical element used by organisms in minute quantities and essential to their physiology.
An element that is present in very small quantities.
An element that appears in mineral in a concentration of less than l percent (often less than 0.001 percent).
Element that is normally in very small amounts in the earthâ€(tm)s crust or in a body.
Any mineral that is only present in the body in minute concentrations.
an element that occurs at very small quantities in the body but is nonetheless important for many biological processes
mineral needed in small amounts.
An element an animal requires in small amounts. 32
Any element in water or wastewater that, for reasons associated with natural distribution, industrial uses, solubility, or other factors, is present at very low concentrations.
a substance needed in very small amounts for the proper functioning of the body. There are 7 known trace elements: chromium, copper, cobalt, iodine, iron, selenium and zinc.
An element found in only minor amounts (concentrations less than 1.0 microgram per liter) in water or sediment; includes arsenic, cadmium, chromium, copper, lead, mercury, nickel, and zinc.
a chemical element required in minute quantities by an organism to maintain proper physical functioning
A mineral required by the body in extremely small quantities.
An element found in African Violets and other plants in trace amounts. Many of the known trace elements may have beneficial effects for African Violets. These effects, however, have not been fully established. Also see Major Element and Micronutrient.
One of a group of naturally occurring elements found in low ("trace") concentrations in the water, sediment, and tissue measured by the RMP.
A chemical found in very small amounts in a given substance. Organisms need certain trace elements to survive.
An element essential to plant and/or animal nutrition in trace concentration of one percent or less.
In analytical chemistry, a trace element is an element in a sample that has an average concentration of less than 100 parts per million atoms or less than 100 micrograms per gram.
