How Did The Marsh Test Avoid Detection Of Arsenic?

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The Marsh Test is extremely sensitive means of detection of Arsenic and its variations. It was discovered in the 19th century by a Chemist called James Marsh. His development of the
Marsh Test was in pure frustration as he knew the tests that were currently available for the detection of arsenic were nowhere near accurate enough. This would go on to prove categoric involvement with a murder if the evidence of arsenic was in the possession of the accused. Before the invention of the Marsh Test, Poisoners would go undetected because arsenic was so hard to find once inside the body and
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