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trace elements

trace elements (GB)

Name (also microelement) for chemical elements that occur only in low concentration or traces. At extremely low concentration is also spoken of ultra-trace element. As a rule, geochemistry refers to fractions of matter and accompanying elements of rocks and minerals in concentrations below 0.1% and 1000 ppm, respectively, as trace elements. As essential trace elements are in the biology denotes chemical elements that are essential for a living being (colloquially mostly related to humans) are essential and occur in mass fractions of less than 50 mg / kg in the organism. These include arsenic (As), chromium (Cr), cobalt (Co), iron (Fe), iodine (I), copper (Cu), manganese (Mn), molybdenum (Mo), nickel (Ni), selenium (Se), silicon (Si), vanadium (V), zinc (Zn) and tin (Sn). They are for the construction of enzymes necessary. In viticulture are according to Bonitur (Soil analysis) possibly necessary trace elements fertilization added. Trace elements also occur in wine; see below ash. total extract and nutrient,

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