The science or practice of measuring and determining arsenic content in substances, used in chemistry, toxicology, and forensics.
From 'arsenic' plus '-metry' (from Greek 'metron,' measure), following the pattern of 'geometry,' 'thermometry.' Coined in analytical chemistry in the 19th century.
Arsmetry has a grim historical importance—the development of these measurement techniques is directly tied to solving famous poison murders, making it one of chemistry's darkest applications.
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