MEASUREMENT OF GAS-PHASE OH USING LIQUID PHASE SCRUBBING AND HIGH PERFORMANCE LIQUID CHROMATOGRAPHY

利用水杨酸溶液吸收气相OH自由基，生成的荧光产物2，5-二羟基苯甲酸用高效液相色谱法分离测定，推算得到气相OH浓度，根据此原理在实验室条件下，建立了气相OH自由基的测定方法，并利用气相OH标准发生源确定了最优实验条件，得到了气相OH浓度与荧光响应关系，由液相吸收-高效液相色谱法测定的浓度与标准OH气流中的理论浓度比较一致.A calibration system for measuring gas-phase hydroxyl radicals(OH)was established by liquid-phase scrubbing and high performance liquid chromatography(HPLC).It was based on the OH reaction with salicylic acid which produces a stable fluorescent product,2,5-dihydroxybenzoic acid determined by HPLC and fluorescence detection.The OH concentration deduced from the amount of product is relatively uniformed with that in the calibration OH flow.中文核心期刊要目总览(PKU)中国科学引文数据库(CSCD)0181-852