2008•Yunnan Chemical TechnologyRequires access
Determination of Trace Manganese from Foodstuff by Catalytic Kinetic Spectrophotometry
Li Li
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Abstract
A new catalytic spectrophotometric method was established for the determination of trace manganese.The method was based on the catalytic effect of Mn(Ⅱ) on the oxidative discoloration of crystal violet with potassium periodate in the buffer medium of HAc-NaAc,with nitrilotriacetic acid as activator.The determination range was 0.2~ 8.0 μg/L and the detection limit was 0.076 μg/L with the relative standard deviation of 1.6%(n=11).The method was used to determine trace manganese in foodstuff with satisfactory results.