Marsh, James (September 2, 1794 - June 21, 1846) - an English chemist, the author of a sensitive reaction to the presence of arsenic, the so-called Marsh test .
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Biography
He worked as a military chemist (ordnance chemist) at the Royal Arsenal in Woolwich, engaged in the development and improvement of fuses. Collaborated with M. Faraday. In 1833 he was summoned as a forensic chemist in the murder case, which was committed by arsenic poisoning. James Marsh conducted a standard test that found arsenic in the body. However, when he came to demonstrate the results of the investigation to the court, the prototypes worsened, which allowed the suspect to be acquitted in connection with the doubts that arose. After that, James Marsh finalized and modified the test, making it more sensitive. In 1836 he first described this test in The Edinburgh Philosophical Journal