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在酸性条件下,香草醛对Ru(phen)32+-Ce(Ⅳ)反应体系化学发光有显著的减弱作用,据此建立了流动注射-化学发光检测香草醛的新体系。对影响流动注射化学发光的各因素进行了实验研究,优化了反应条件和各项测定参数。结果表明,优化条件下,在质量浓度为4.00×10-7～8.25×10-6g/mL的范围内,相对发光强度与其质量浓度呈对数线性关系,检出限(3σ)为2.90×10-7g/mL,对质量浓度为3.0×10-6g/mL的香草醛进行11次平行测定,相对标准偏差(RSD)为2.6%。对合成样品中香草醛测定的回收率在98.3%～102.8%之间。采样频率120次/h。
Under acidic conditions, the vanillin had a markedly weakened effect on the chemiluminescence of Ru (phen) 32 + -Ce (Ⅳ) reaction system, and a new flow injection-chemiluminescence detection of vanillin was established. The factors influencing the flow injection chemiluminescence were studied experimentally, and the reaction conditions and parameters were optimized. The results showed that under the optimal conditions, the relative luminescence intensity showed a logarithmic linear relationship with the mass concentration in the range of 4.00 × 10-7 ~ 8.25 × 10-6g / mL, the detection limit (3σ) was 2.90 × 10 The relative standard deviation (RSD) was 2.6% for 11 replicates of vanillin with a mass concentration of 3.0 × 10-6 g / mL. The recoveries of vanillin in synthetic samples ranged from 98.3% to 102.8%. Sampling frequency 120 times / h.