heavy metal

A very imprecise term, never defined by any authoritive body, used loosely to refer to both the element and its compounds. It is based on categorization by density, which is rarely a biologically significant property. It is often used as a group name for metals and metalloids that have been associated with contamination and potential toxicity or ecotoxicity. However, the assumption that all so-called "heavy metals" and their compounds have highly toxic or ecotoxic properties is not supported by facts. Even further, the list of "heavy metals" is not clearly defined and has no basis in their chemistry. Even the term "metal" is commonly misused in both toxicological literature and in legislation to mean the pure metal and all the chemical species in which it may exist.

Very often, ther term "heavy metals" is used, based on one of the following "definitions":

The use of the term "heavy metals"  is highly discorouged  by IUPAC.

The term "heavy metal" was found in the following pages:

Instrument database: B3 Electronic Design - PDV 6000 Heavy metal analyzer
Link database: Blacksmith Institute: Arsenic in Groundwater - Arsenic Pollution
Journals database: Journal of Heavy Metal Toxicity and Diseases
Arsenic-absorbing fern may soak up toxic metal to repel hungry bugs, UF researchers say | EVISA's News
Study links high levels of cadmium and lead in blood to pregnancy delay | EVISA's News
TraceSpec 2016: 15th Workshop on Progress in Trace Metal Speciation for Environmental Analytical Chemistry | EVISA's Agenda of Events
Fractionation as a first step towards speciation analysis | EVISA's News
Instrument database: Büchi Labortechnik AG - Digestion Units K-424/K-435
Link database: CEC: Heavy Metals in Waste
Directory of scientists: Alfredo Sanz-Medel
EU proposes to ratify international Minamata Convention meant to protect citizens from mercury pollution | EVISA's News
Link database: eMedicine: Toxicity, Heavy Metals
ICOBTE 2015: 13th International Conference on the Biogeochemistry of Trace Elements | EVISA's Agenda of Events
Link database: Mercury concentrations in the Canadian population, 2007 to 2009
Mercury Containing Preservative Alters Immune Function | EVISA's News
Link database: European Commission: Cadmium in Food
Huge field experiment for assessing human ethylmercury risk starting in october | EVISA's News
Link database: EFSA: Cadmium in food - Scientific opinion of the Panel on Contaminants in the Food Chain
17th Annual Goldschmidt Conference | EVISA's Agenda of Events
Link database: USGS: Statistics and Information: Thallium