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[求助] EPR测O3/H2O2羟基自由基无法检出

大家好,小弟最近用EPR检测O3/H2O2体系浓度,之前在原2l反应体系f反应,然后取样加入DMPO立即检测,未检测出,之后尝试用液相小瓶加入1mlH2O2(30%),通入臭氧(100mg/L)曝气5min,曝气前加入DMPO,使其浓度达100mmol/l,曝气完后马上用EPR检测,可惜未检测出来,想知道会是什么原因?
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