Comparative analysis of ion-selective electrode method and high-throughput rapid determination method for determination of fluoride level in drinking water
10.3760/cma.j.cn231583-20240104-00005
- VernacularTitle:离子选择电极法与高通量快速测定法测定生活饮用水氟含量的比较分析
- Author:
Guanglan PU
1
;
Cuiling LA
1
;
Qing LU
1
;
Xin ZHOU
1
;
Ping CHEN
1
;
Yanan LI
1
;
Peizhen YANG
1
;
Lansheng HU
1
;
Mingjun WANG
1
;
Ping YANG
1
;
Xianya MENG
1
;
Qiang ZHANG
1
Author Information
1. 青海省地方病预防控制所地方病预防控制科，西宁 811602
- Publication Type:Journal Article
- Keywords:
Method;
Fluoride;
Ion-selective electrode method;
High-throughput rapid determination method
- From:
Chinese Journal of Endemiology
2025;44(1):57-60
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To analyze the differences in determination of fluoride level in drinking water by ion-selective electrode method and high-throughput rapid determination method.Methods:The precision test was carried out by using the two methods to measure two kinds of fluoride standard substances, water samples of external quality control assessment from 2021 to 2023 (two kinds each year) and the fluoride level in three drinking water samples (for 5 times/each sample). Accuracy testing was conducted by measuring the external quality control assessment water samples and the spiked recovery rates drinking water, and water samples were grouped (water fluoride ≤1.00, > 1.00 mg/L) and analyzed according to the "Hygienic Standards for Drinking Water" (GB 5749-85). SPSS 23.0 software was used for statistical analysis of the measurement results.Results:(1) The correlation coefficients ( r) of the working curves of the two methods were both > 0.990, meeting the quality control requirements. (2) In the precision test, when comparing the results of the two methods for detecting two kinds of fluoride standard substances, there was no statistically significant difference ( F = 0.36, 0.15, P = 0.564, 0.707), and the coefficients of variation ( CV) were all < 5%. The CV of the detection results of the external quality control assessment water samples and drinking water samples were < 5%. (3) In the accuracy test, when the fluoride concentration in water was ≤1.00 mg/L, there was no statistically significant difference in the spiked recovery rates between the two methods ( F = 0.49, P = 0.504). When the fluoride concentration in water was > 1.00 mg/L, there was a statistically significant difference in the spiked recovery rates between the two methods ( F = 24.75, P = 0.003). Conclusions:The ion-selective electrode method has the advantages of wide detection range and wide adaptability, while the high-throughput rapid determination method has high accuracy. Testing personnel can weigh and choose the appropriate determination method based on the actual laboratory conditions and sample concentration range.
