A new system for the determination of trace copper(II) by fluorimetry

作者：Su MH; Feng ML; Zhang ZJ^*

来源：Chinese Journal of Analytical Chemistry, 2000, 28(4): 446-448.

• fluorimetry
• nihydrin
• hydrogen peroxide
• copper(II)

Ninhydrin reacts with hydrogen peroxide to form a fluorescent compound and Cu2+ can increase the fluorescence intensity. Based on the linear response of the fluorescence intensity to the Cu2+ concentration,a novel method was established for determining Cu2+ with the detection Limit of 7.4 x 10(-12) g/mL. The linear range is 10(-11) similar to 1 x 10(-6) g/mL. The dynamics process of reaction and the appropriate conditions for the determination of Cu2+ were investigated. The method has been used for determination of trace copper(II) in human hair and codonopsis pilosula. The results obtained were in good agreement with that obtained by atomic absorption spectrometry.

• 出版日期2000-4
• 单位陕西师范大学