noun
COLLOCATIONS FROM CORPUS
■ VERB
contain
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They often contain toxic impurities and may be an irritant to the skin.
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The beans contain an impurity which causes James to become violently ill.
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It contains a number of impurities the sum of which are known as water hardness salts.
EXAMPLES FROM OTHER ENTRIES
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Lime is added to the liquid metal to remove all the impurities.
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There were impurities in the aluminum.
EXAMPLES FROM CORPUS
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Ignorance and its sister, doubt, are the essence of all impurities and the source of every mental and spiritual element.
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Other sources of a suitable soda-rich mineral with the same specific impurity pattern are difficult to suggest.
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The fog, apart from being a mutated organism, now contains carbon dioxide and various other impurities.
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They often contain toxic impurities and may be an irritant to the skin.
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Thus Ahuja's book is the very first in the literature devoted to the evaluation of impurities in drugs.
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With laser techniques, however, the molecular energy levels of the impurities are quite different from the atomic ones.
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Workers add chemicals to remove impurities such as sulphides.