用 FR-PAN 荧光法测定水样中的镉含量

IF 3.8 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Water, Air, & Soil Pollution Pub Date : 2024-11-25 DOI:10.1007/s11270-024-07575-7

Xinqing Wang, Dongying Lin, Jingjing Liu, Xilin Xiao, Lanxing Ren, Boshi Huang, Jinhua Xue

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引用次数: 0

摘要

本研究的目的是利用荧光素（FR）和 1-(2-吡啶偶氮)-2-萘酚（PAN）建立一种新型荧光测定镉的方法。在 pH 值为 9.75 的氯化铵缓冲溶液中，荧光素和 PAN 之间会发生能量转移，从而导致荧光淬灭。在该系统中加入镉（II）会增强淬灭程度。根据这一现象，我们建立了一种测定镉的新方法，并对所需的实验条件进行了优化。在最佳实验条件下，体系的荧光强度在 7.81 × 10-7 至 2.14 × 10-5 mol L-1 范围内呈线性下降。本研究采用的线性回归方程为 F = 123.63 + 170.65c (× 10-6 mol L-1)，相关系数为 0.9951，检出限为 2.34 × 10-7 mol L-1，相对标准偏差为 0.18%。该方法简便、灵敏、快速、经济。该方法可用于实际样品（自来水、池塘水和湘江水）中镉的测定，其结果与石墨炉原子吸收法（t 检验）一致。该方法为镉 (II) 的定量提供了一种创新方法。

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Determination of Cadmium in Water Samples by FR-PAN Fluorescence Method

The objective of this study was to establish a novel method of fluorescence for the determination of cadmium using fluorescein (FR) and 1-(2-Pyridinylazo)-2-Naohthalenol (PAN). In the pH 9.75 buffer solution of the ammonia-ammonium chloride, the energy transfer between FR and the PAN can occur, which can result in the quenching of the fluorescence. The addition of Cd (II) to this system enhances the degree of quenching. This phenomenon has led to the establishment of a novel method for the determination of cadmium, which has been optimized in terms of the required experimental conditions. In the optimal experimental conditions, the fluorescence intensity of the system decreased linearly in the range of 7.81 × 10^–7 to 2.14 × 10^–5 mol L⁻¹. The linear regression equation used in this study was F = 123.63 + 170.65c (× 10^–6 mol L⁻¹) under the correlation coefficient of 0.9951, the detection limit of 2.34 × 10^–7 mol L⁻¹, and the relative standard deviation of 0.18%. The proposed method was simple, sensitive, fast, and economical. The method can be employed for the determination of cadmium in real samples (tap-water, pond water and Xiangjiang River) with the results demonstrating consistency with the graphite furnace atomic absorption method (t-test). This approach offers an innovative method for the quantification of Cd (II).

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来源期刊

Water, Air, & Soil Pollution 环境科学-环境科学

CiteScore

4.50

自引率

6.90%

发文量

448

审稿时长

2.6 months

期刊介绍： Water, Air, & Soil Pollution is an international, interdisciplinary journal on all aspects of pollution and solutions to pollution in the biosphere. This includes chemical, physical and biological processes affecting flora, fauna, water, air and soil in relation to environmental pollution. Because of its scope, the subject areas are diverse and include all aspects of pollution sources, transport, deposition, accumulation, acid precipitation, atmospheric pollution, metals, aquatic pollution including marine pollution and ground water, waste water, pesticides, soil pollution, sewage, sediment pollution, forestry pollution, effects of pollutants on humans, vegetation, fish, aquatic species, micro-organisms, and animals, environmental and molecular toxicology applied to pollution research, biosensors, global and climate change, ecological implications of pollution and pollution models. Water, Air, & Soil Pollution also publishes manuscripts on novel methods used in the study of environmental pollutants, environmental toxicology, environmental biology, novel environmental engineering related to pollution, biodiversity as influenced by pollution, novel environmental biotechnology as applied to pollution (e.g. bioremediation), environmental modelling and biorestoration of polluted environments. Articles should not be submitted that are of local interest only and do not advance international knowledge in environmental pollution and solutions to pollution. Articles that simply replicate known knowledge or techniques while researching a local pollution problem will normally be rejected without review. Submitted articles must have up-to-date references, employ the correct experimental replication and statistical analysis, where needed and contain a significant contribution to new knowledge. The publishing and editorial team sincerely appreciate your cooperation. Water, Air, & Soil Pollution publishes research papers; review articles; mini-reviews; and book reviews.