利用莫林-过氧化氢体系的动力学荧光法测定痕量镍（ΙΙ）含量

IF 0.8 4区化学 Q4 SPECTROSCOPY

Spectroscopy Pub Date : 2024-02-01 DOI:10.56530/spectroscopy.bm3882n1

Zhang Xin, Sheng Li

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引用次数: 0

摘要

利用镍（Ni[Ⅱ]）催化过氧化氢氧化吗啉以减弱其荧光。在 pH 值为 10.10 的 Na2B4O7-NaOH 缓冲溶液中，镍（Ⅱ）对 H2O2 溶液氧化吗啉具有明显的催化作用。在最大激发和发射波长（λex = 440 nm 和 λem = 530 nm）处，系统的荧光强度在一定范围内与 Ni（Ⅱ）的浓度呈线性相关。线性方程为 ΔF = 11463ρ (μg/mL) - 34.70，R2 = 0.9992。线性范围为 1.6 × 10-2 - 9.6 × 10-2 μg/mL，检出限为 2.9 × 10-4 μg/mL。最后对自来水、黄河水和茶叶样品进行了分析，回收率分别为 99.6%、107.3%和 104.6%。该方法适用于水样中痕量镍(II)的测定。

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Determination of Trace Nickel(ΙΙ) Using a Kinetic Fluorescence Method with a Morin-Hydrogen Peroxide System

Nickel (Ni[Ⅱ]) was used to catalyze the hydrogen peroxide oxidation of morin to weaken its fluorescence. In Na2B4O7-NaOH buffer solution at pH 10.10, Ni(Ⅱ) has an obvious catalytic effect on the oxidation of morin by H2O2 solution. At the maximum excitation and emission wavelengths (λex = 440 nm and λem = 530 nm), the fluorescence intensity of the system is linearly correlated with the concentration of Ni(II) within a certain range. The linear equation is ΔF = 11463ρ (μg/mL) − 34.70, and the R2 = 0.9992. The linear range is 1.6 × 10-2 − 9.6 × 10-2 μg/mL, and the detection limit was 2.9 × 10-4 μg/mL. Finally, the samples of tap water, Yellow River water and tea were analyzed, with the recoveries being 99.6%, 107.3%, and 104.6%, respectively. This method is suitable for the determination of trace Ni(II) in water samples.

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来源期刊

Spectroscopy 物理-光谱学

CiteScore

1.10

自引率

0.00%

发文量

审稿时长

3 months

期刊介绍： Spectroscopy welcomes manuscripts that describe techniques and applications of all forms of spectroscopy and that are of immediate interest to users in industry, academia, and government.