【摘要】 本文基于３，４－二羟基苯甲酸对Ｃｏ２＋离子催化的鲁米诺－Ｈ２Ｏ２化学发光体系的抑制作用，首次建立了３，４－二羟基苯甲酸的流动注射化学发光抑制分析法，发光信号的降低值ΔⅠ与３，４－二羟基苯甲酸的浓度在１×１０－６～１×１０－５ｍｏｌ／Ｌ的范围内呈良好的线性关系，检出限为２．７×１０－７ｍｏｌ／Ｌ（ｎ＝１１），对８×１０－６ｍｏｌ／Ｌ３，４－二羟基苯甲酸测定的相对标准偏差为２．３％（ｎ＝１１）。更多还原

【Abstract】 It was found that 3,4 dihydroxybenzoic acid (protocatechuric acid)inhibited chemiluminescence of luminol H 2O 2 reaction catalyzed by Co 2+ .On this basis,a flow injection method has been developed for the determination of protocatechuric acid.The method is simple,convenient and sensitive with detection limit of 2 7×10 -7 mol/L and is effective to determine protocatechuric acid in the range of 1×10 6 1×10 -5 mol/L.The variation coefficient of eleven determinations for 8×10 -6 mol/L protocatechuric acid is 2 3%.更多还原