FOOD SCIENCE ›› 2005, Vol. 26 ›› Issue (12): 193-195.
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DU Juan
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Abstract: The sensitizing action of mixed surfactants(SDS-OP) in the ingrain reaction of zinc and xylenol orange developmentwas studied. With mixed surfactants SDS and OP, in a pH 5.4～6.0 buffer solution, the reaction formed a steady purplish red complex compound. The absorption maxima lied at 580 nm with its apparent molar absorptivity of 1.15×105Lmol•cm. Beer’s law was obeyed in the range of 0.0～28.0μgml for zinc(Ⅱ). Equation was: A = 0.295C+0.001.
Key words: mixed surfactant, xylenol orange, spectrophptometry, zinc iron
DU Juan. Mixed Surfactants to Enhance Sensitizing Effect in Sepectrophotometric Determination of Trace Zinc in Milk Powder[J]. FOOD SCIENCE, 2005, 26(12): 193-195.
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