数字农科院2.0

A simple and low-cost method for fluoride analysis of plant materials using alkali extraction and ion-selective electrode

文献类型： 外文期刊

作者： Chenyu Zhang;Mark G.M. Aarts;Antony van der Ent

作者机构：

关键词： Chemometrics;Fluoride;Ion-selective electrode;Orthogonal assay design;Plant research

期刊名称： Plant Methods

ISSN： 1746-4811

年卷期： 2025 年 21 卷 1 期

页码：

收录情况： SCIE（2025版）

摘要： Backgrounds: Existing methods for fluoride (F-) determination in plant material require expensive equipment and specialized reagents. This study aimed to develop a simple and cost-effective method for fluoride analysis in plant samples. Results: Using an orthogonal assay design with certified reference material, this study optimized a sodium hydroxide extraction method (5 mol·L-1) with heating at 120 °C for 0.5 h, followed by the addition of potassium acetate, ionic strength adjustment, and measurement via an ion-selective electrode. The method achieved a limit of detection (LOD) and limit of quantification (LOQ) of 1.41 and 4.71 mg·kg⁻¹, respectively. Recovery rates ranged from 84.74 to 89.34% in Arabidopsis thaliana (intraday relative standard deviation [RSD] ≤ 2.31%, inter-day RSD ≤ 4.17%) and from 83.53 to 91.55% in Camellia sinensis (intraday RSD ≤ 3.11%, inter-day RSD ≤ 4.98%). In A. thaliana cultivated in NaF-dosed (500 µM) nutrient solution, the fluoride concentration in the shoot was 16.00 mg·kg-1; In C. sinensis grown under 250 µM NaF treatment, the shoot fluoride concentration was 292.71 mg·kg-1. Moreover, the fluoride concentration in Tea products purchased from local supermarkets ranged from 16.28 to 61.78 mg kg-1. Conclusion: This study presents a simple, reliable, and cost-effective method for fluoride analysis in plant materials, which can be further validated through inter-laboratory testing to establish a standardized approach.

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