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本文研究了应用Ｇａ（没食子酸）－Ｈ２Ｏ２－ＯＨ－化学发光体系、流动注射技术测定乙醛的条件，如反应介质及其ｐＨ值，Ｇａ及Ｈ２Ｏ２溶液的浓度，温度、试液混合次序与化学发光强度的关系等，选择了流动注射系统的若干参数。所拟定的方法测定乙醛的浓度范围为每ｍＬ１．７×１０－３～４．４×１０－７ｇ，相对标准偏差为１．８％（用２×１０－５ｇ／ｍＬ乙醛溶液进行１１次平行测定），检出限为每ｍＬ３．１×１０－８ｇ，采样频率为１２０次／ｈ。该法用于有机化工厂废水及酒精中乙醛的测定，结果令人满意。
In this paper, the conditions for the determination of acetaldehyde by flow injection technique using Ga (gallic acid) -H2O2-OH-chemiluminescence system, such as the reaction medium and its pH value, the concentration of Ga and H2O2 solution, the temperature, The relationship between luminous intensity, etc., selected a number of flow injection system parameters. The proposed method for the determination of acetaldehyde concentration range of 1.7 × 10-3 ~ 4.4 × 10-7g per mL, the relative standard deviation of 1.8% (with 2 × 10-5g / mL acetaldehyde solution for 11 Times parallel determination), the detection limit of 3.1 × 10-8g per mL, the sampling frequency of 120 times / h. The method was applied to the determination of acetaldehyde in waste water from organic chemical plants and alcohol and the results were satisfactory.