期刊论文

Determination of Formaldehyde by Catalyzed Resonance Fluorescence Method with HCHO-Rh6G-KBrO3-H^＋ System and TX-100 Sensitization

中文

广东化工

1007-1865

2016

43

5

157-158,156

10.3969/j.issn.1007-1865.2016.05.077

湖南省科技计划基金项目（编号:2015SK20112）； 湖南省教育厅科研基金项目（编号14A123）；

本校为第一机构

研究了TritonX-100(TX-100)对罗丹明6G(Rh6G)共振荧光(RF)的增强作用和“Rh6G-TX-100-KBrO3-HCHO-H+”体系的共振荧光特性,建立一种高灵敏度和高选择性的催化共振荧光法测定痕量甲醛.在H2SO4介质中,HCHO能催化KBrO3氧化Rh6G,使Rh6G的共振荧光强度减弱,在545 nm处得到最大共振荧光峰值,甲醛浓度在0.100至4.50 μg/L范围内荧光强度改变值(△F)与甲醛浓度有良好线性关系,其回归方程为△F=438.4c(μg/L)+561.0,r=0.9990.检出限为0.038 μg/L,回收率96.0％～106.4％.该方法仪器设备简单,试剂成本低,特异性好,可用于实际样品中甲醛含量的测定,结果满意.

To study on the enhancement effect of TX-100 on the RF of Rh6G and develop a catalyzed RF method for the determination of formaldehyde. In H2804 medium, the RF intensity of Rh6G was significantly reduced due to the catalytic effect of HCHO on the reaction of Rh6G and potassium bromated. The maximum resonance fluorescence wavelength is at 545 nm. There was a good linear relationship between AF of the reaction system and the concentration of HCHO in concentration of 0.100 to 4.50 μg/L. The equation of linear regression of working curve is AF=438...