Optimization Study on Potassium Ferricyanide in the Determination of Selenium in Water by Hydride Generation Atomic Fluorescence Spectrometry
Zhou Huidong
Qiu Hao
Li Liangting
Feng Yuanqiang
Su Siqiang
Li Yonglin
Abstract：This study systematically evaluated the action mechanism and interference suppression effect of potassi-um ferricyanide(K₃[Fe(CN)₆])in the determination of selenium in water by hydride generation-atomic fluorescence spectrometry(HG-AFS).Through analyzing the interference effect of 21 common metal ions(including copper,lead,manganese,arsenic,etc.),the results revealed that copper(Cu²⁺)induced significant negative interference on selenium determination in the absence of potassium ferricyanide,while lead(Pb²⁺)exhibited positive interference in the presence of potassium ferricyanide but showed no significant effect without reagents.Manganese(Mn²⁺)consis-tently caused positive deviation regardless of potassium ferricyanide addition.Experimental data demonstrated that 18 ions,including potassium,sodium,calcium,and magnesium showed no interference within the concentration lim-it specified by Standards for Drinking Water Quality(GB 5749-2022).The conclusion indicated that routine drink-ing water samples may omit the addition of potassium ferricyanide.This optimized protocol reduced reagent costs and operational risks while providing practical guidance for water quality analysis.
Keywords：Hydride generation atomic fluorescence spectrometryselenium determinationpotassium ferricyanideInterference suppressionwater quality analysis
Publication Date：2025-07-30
Online Publishing Date：2025-08-18(First online date of this platform, not the publication date of the document)
Pages：6( 35-40 )