Spectrophotometric Determination of Trace Manganese in Food by Dissolving the Filter Membranes

Abstract

Abstract: A new preconcentration and determination method of manganese was studied. The complex of Mn-DBHPF-CTMAB and the microfilter membrane were dissolved in DMSO. The manganese was determined. The maximum absorption was observed at 592 nm with molar absorptivity 4.70×105L•mol-1•cm-1.For manganese content within 0～12μg/5ml,Beer’s Law is conformed. This method has high sensitivity. Satisfactory results were obtained for the determination of trace manganese in food.

Key words: trihydroxy-9-(3, 5-dibromo-4-hydroxy)phenylf-luorone-3 , Microfilter membrane , Spectrophotometric method , Manganese

YANG Xiu-Li, TAN Xiao-Jun, WANG Jian-Jun, CAO Yan-Ping. Spectrophotometric Determination of Trace Manganese in Food by Dissolving the Filter Membranes[J]. FOOD SCIENCE, 2002, 23(5): 111-113.

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Spectrophotometric Determination of Trace Manganese in Food by Dissolving the Filter Membranes

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