英语词汇“Marsh test”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

Marsh test

/ˈmɑːʃ tɛst/

(also Marsh's test) Chemistry

noun

A sensitive test for the presence of arsenic, in which nascent hydrogen generated by the addition of hydrochloric acid and zinc is used to reduce any arsenic in a sample to the gas arsine, which is then converted by heat to a brown deposit of metallic arsenic (distinguishable from the similar stain given by antimony by its solubility in sodium hypochlorite solution).

Origin

Mid 19th century; earliest use found in London and Edinburgh Philosophical Magazine. From the name of James Marsh, English chemist and physicist, who devised the method in 1836 + test.

单词	Marsh test
释义	Marsh test /ˈmɑːʃ tɛst/ (also Marsh's test) Chemistry noun A sensitive test for the presence of arsenic, in which nascent hydrogen generated by the addition of hydrochloric acid and zinc is used to reduce any arsenic in a sample to the gas arsine, which is then converted by heat to a brown deposit of metallic arsenic (distinguishable from the similar stain given by antimony by its solubility in sodium hypochlorite solution). Origin Mid 19th century; earliest use found in London and Edinburgh Philosophical Magazine. From the name of James Marsh, English chemist and physicist, who devised the method in 1836 + test.
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