目的: 基于荧光猝灭或增强机制,构建稀土掺杂上转换纳米材料NaYF4: Yb, Er@TGA直接对金属离子进行定量分析的方法,实现对金属离子快速、准确、灵敏检测。方法: 通过溶剂热法制备出性能优良的稀土掺杂上转换纳米材料NaYF4: Yb, Er@TGA,并对其进行表征;通过测量14种常见的金属离子对NaYF4: Yb, Er@TGA荧光强度的影响,筛选能够引起NaYF4:Yb, Er@TGA荧光强度增强或下降,且与金属离子浓度呈线性关系的金属离子类型,进而建立检测新方法。结果: 金属离子Mg2+、Fe3+分别在浓度范围为0～7.00 μg/mL、0～6.00 μg/mL与NaYF4: Yb, Er@TGA的荧光强度呈现良好的线性关系,其标准曲线方程的线性系数分别为0.992 4、0.998 2,检出限分别为1.79 μg/mL、1.30 μg/mL,加标回收率分别为95.5%～98.8%、92.5%～97.8%,方法相对标准偏差分别为4.05%、8.18%。结论: 该方法检测限低、准确度较高、精密度较好,有望用于实际样品中Mg2+、Fe3+定量分析。
白安琪
,
彭孔浩
,
罗利霞
,
崔茹慧
,
岳晓梅
,
李淑荣
,
冀华
,
孟佩俊
. 基于稀土掺杂上转换纳米材料NaYF4: Yb,Er@TGA直接对金属离子进行定量分析的方法探究*[J]. 包头医学院学报, 2024
, 40(1)
: 91
-96
.
DOI: 10.16833/j.cnki.jbmc.2024.01.016
Objective: To establish a fast, accurate and sensitive method for direct quantitative analysis of metal ions based on rare earth elements upconversion nanoparticles NaYF4: Yb, Er@TGA. accurate to fluorescence quenching or enhancement mechanism. Methods: Rare earth elements upconversion nanoparticles NaYF4: Yb, Er@TGA were prepared and characterized by solvothermal method. By measuring the influence of 14 common metal ions on the fluorescence intensity of NaYF4: Yb, Er@TGA, we screened the metal ion types that could increase or decrease the fluorescence intensity of NaYF4: Yb, Er@TGA in a linear relationship with the concentration of metal ions, so as to establish a new detection method. Results: The fluorescence intensity of metal ions Mg2+ and Fe3+ showed a good linear relationship with NaYF4: Yb, Er@TGA in the concentration ranges of 0～7.00 μg /mL and 0～6.00μg /mL, respectively. The linear coefficients of the standard curve equations were 0.992 4 and 0.998 2, respectively. The detection limits were 1.79 μg/mL and 1.30 μg/mL, and the recoveries were 95.5%～98.8% and 92.5%～97.8%, respectively. The relative standard deviations were 4.05% and 8.18%, respectively. Conclusion: This method has low detection limit, high accuracy and good precision, and is expected to be used for quantitative analysis of Mg2+ and Fe3+ in practical samples.
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