PBN was finally selected to trap the gas-phase free radicals and the formed adduct was detected with ESR in the determination of gas-phase free radicals in cigarette smoke.
研究结果表明：以PBN为自旋捕捉剂捕集气相自由基用ESR检测的方法和以剑桥滤片捕集固相自由基用ESR检测的方法来分别检测气相自由基和固相自由基的方法是可行的。
The necessity of introducing exhaust particulate trap in domestic automotive diesels was discussed on the basis of the present exhaust smoke situation.
根据国产车用柴油机的排气烟度现状，论证了采用排气微粒过滤器的必要性。
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