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A modified Trautz-Schorigin reaction, by using tannic acid-H2O2 system for the oxidation and determination of two kinds of carbonyl compounds was developed in this paper. It was found that formaldehyde and acetaldehyde could effectively enhance the chemiluminescence signals of tannic acid-H2O2 system in alkaline medium. Under optimized conditions, the proposed method has a linear range of 7 × 10-9-1 × 10-4 mol L-1 for formaldehyde and 1 × 10-8-1 × 10-4 mol L-1 for acetaldehyde with detection limits of 9 × 10-11 and 3 × 10-10 mol L-1, respectively. The relative standard deviations for 15 repeated measurements of 1 × 10-6 mol L-1 HCHO and CH3CHO are 1.13% and 1.65%, respectively. Analysis time per sample is 35 seconds. A comparison of results found by the proposed method with those obtained by a standard reference method provided good agreement. The proposed method is simple, rapid, convenient, and sensitive. [ABSTRACT FROM AUTHOR]