<P> The first breakthrough in the detection of arsenic poisoning was in 1775 when Carl Wilhelm Scheele discovered a way to change arsenic trioxide to garlic - smelling arsine gas ( AsH ) , by treating it with nitric acid ( HNO ) and combining it with zinc . </P>
<P> The first breakthrough in the detection of arsenic poisoning was in 1775 when Carl Wilhelm Scheele discovered a way to change arsenic trioxide to garlic - smelling arsine gas ( AsH ) , by treating it with nitric acid ( HNO ) and combining it with zinc . </P>
who devised the first test for detection of arsenic in 1775
who devised the first test for detection of arsenic in 1775
Carl Wilhelm Scheele
Carl Wilhelm Scheele