Mercuric chloride paper with arsenic gas from
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Principle: Limit test of Arsenic is based on the reaction of arsenic gas with hydrogen ion to form yellow stain on mercuric chloride paper in presence of reducing agents like potassium iodide. It is also called as Gutzeit test and requires special apparatus.
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mohitkumar1508199:
the limit test of arsenic is also known as
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Based on the reaction of arsenic gas with hydrogen ion to form yellow stain on mercuric chloride paper in presence of reducing agents like potassium iodide. British Pharmacopoeia suggest the use of mercuric chloride paper instead of mercuric bromide paper.
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