比率荧光法定量检测水体中磷酸盐的含量

doi:10.16039/j.cnki.cn22-1249.2023.05.004

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摘要

天然水中磷酸盐的含量过高，会造成藻类的过度繁殖，因此磷是评价水质的重要指标。本文以谷胱甘肽和柠檬酸为原料合成了最大荧光发射波长为424 nm的石墨烯量子点（简称GGQDs），并将其与CdTe量子点（最大荧光发射波长为578 nm）混合，得到了比率荧光检测体系（简称GCS体系）。依据荧光强度的变化（F424 nm / F578 nm）与磷酸盐浓度之间的线性关系，建立了一种定量分析磷酸盐含量的方法。该方法的线性范围为15 - 90 μmol/L，最低检出限为6.66 μmol/L。该方法具有较高的灵敏性、选择性与稳定性，可用于检测水体中的磷酸盐含量。

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	李兰
	金丽＊
	张建坡＊

关键词: 比率荧光法磷酸盐定量分析石墨烯量子点 CdTe量子点

Abstract:

In natural water, phosphorus is an important indicator for evaluating water quality, which could cause excessive growth of algae. In this paper, graphene quantum dots (GGQDs in short) with a maximum fluorescence emission wavelength of 424 nm was synthesized by using glutathione and citric acid as a raw material, which has been mixed with CdTe quantum dots (maximum fluorescence emission wavelength of 578 nm) to form a ratio fluorescence detection system (GCS in short). Based on the linear relationship between the change of fluorescence intensity (F 424 nm / F 578 nm) and the concentrations of phosphate, a quantitative analysis method for phosphate has been established. The linear range of this method is 15 - 90 μmol/L, the lowest detection limit is 6.66 μmol/L. This method has high sensitivity, selectivity and stability, could be used for detection of phosphate water.

Key words: ratio-fluorescence phosphate quantitative analysis graphene CdTe quantum dots

出版日期: 2023-05-25 发布日期: 2023-05-25 整期出版日期: 2023-05-25

O657.3

引用本文:

李兰, 金丽＊, 张建坡＊. 比率荧光法定量检测水体中磷酸盐的含量 [J]. 吉林化工学院学报, 2023, 40(5): 15-19.
LI Lan, JIN Li, ZHANG Jianpo. Application of Ratio Fluorescence Method for Quantitative Analysis of Phosphate in Water . Journal of Jilin Institute of Chemical Technology, 2023, 40(5): 15-19.

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https://xuebao.jlict.edu.cn/CN/10.16039/j.cnki.cn22-1249.2023.05.004 或 https://xuebao.jlict.edu.cn/CN/Y2023/V40/I5/15

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