Study of Direct Fluorophotometric and Flow-Injection Fluorophotometric Methods Based on the Inhibitory Effect for the Determination of Trace Formaldehyde
Abstract：Sulfite reacts with o-phthalaldehude in the presence of ammonium forming the highly fluorescing isoindole-1-sulfonate in neutral or weakly acid solution, and formaldehyde has inhibitory effect on it. Based on this principle, the authors developed the direct fluorophotometric and flow-injection fluorophotometric methods for the determination of trace formaldehyde. The maximum excitation wavelength and the maximum emission wavelength are 320 and 390 nm respectively. With the direct fluorophotometric method, formaldehyde in the concentration range of 0.10-1.60 μg·mL-1 can be determined with a detection limit of 0.046 μg·mL-1. With the flow-injection fluorophotometric method, formaldehyde in the concentration range of 0.10-2.00 μg·mL-1 can be determined with a detection limit of 0.085 μg·mL-1. The methods were applied respectively to the analysis of river water with satisfactory results.
欧阳小清, 谢增鸿*，郭祖奉，林旭聪，郭良洽 . 静态抑制荧光法和流动注射抑制荧光法测定微量甲醛的研究 [J]. 光谱学与光谱分析, 2004, 24(11): 1395-1399.
OUYANG Xiao-qing，XIE Zeng-hong*，GUO Zu-feng，LIN Xu-cong，GUO Liang-qia . Study of Direct Fluorophotometric and Flow-Injection Fluorophotometric Methods Based on the Inhibitory Effect for the Determination of Trace Formaldehyde . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2004, 24(11): 1395-1399.
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