β-环糊精增敏催化动力学法测定痕量锰的研究

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Abstract A new catalytic spectrophotometric method for the determination of trace amount of Mn(Ⅱ) has been developed. The method is based on the oxidation of alizarin green(AG) by potassium periodate in the presence of β-cyclodexdrin(β-CD) as a sensitizer and nitrilotriacetic acid as an activator. The linear range of the method was 0-2.4 ng·mL^-1 for Mn(Ⅱ), the determination limit was 0.097 ng·mL^-1, the relative standard deviation was 0.45%(n=12) for 1.6 ng· mL^-1 of Mn(Ⅱ), and the sensitivity was increased by a factor of 2.5 compared to that in the absence of the β-CD. The method was used for the determination of Mn(Ⅱ) in cereal samples and wine samples with satisfactory results. The mechanism of this reaction system was also presented.

Key words：Catalytic spectrophotometry;β-Cyclodexdrin(β-CD);Alizarin green (AG);Manganese

Received: 2004-05-16 Accepted: 2004-08-28

ZTFLH:

O657.3

Corresponding Authors: XIE Zeng-hong

Cite this article:

GUO Liang-qia,LIN Xu-cong,XIE Zeng-hong, et al. Study on β-Cyclodexdrin Sensitizing Catalytic Kinetic Spectrophotometric Determination of Mn(Ⅱ) [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2005, 25(10): 1662-1666.

URL:

https://www.gpxygpfx.com/EN/Y2005/V25/I10/1662

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