positive-ion

英 [ˈpɒzətɪv ˈaɪən]

美 [ˈpɑːzətɪv ˈaɪən]

【电】正离子

Electron and Positive-Ion Emission Produced by Pulsed Nd: YAG Laser Ablation of Metal Al
激光烧蚀金属Al产生电子和离子发射的研究
The identification of 19 fatty acid derivatives was carried out by online post-column mass spectrometry with atmospheric pressure chemical ionization ( APCI) source under positive-ion mode detection.
利用柱后在线串联质谱以APCI大气压化学电离源正离子模式实现了各组分的质谱定性。
It was showed that the annual variety characteristic of air-ion concentration was obvious. The average value in summer and winter of small positive-ion were 440 and 330 respective, so the annual variety was 240;
城市一年中空气离子浓度的年变化特征明显，其中小正离子夏季平均值为440个／cm~3，冬季平均值为330个／cm~3，年变幅为240个／cm~3；
The identification of steroid derivatives is performed under atmospheric-pressure chemical ionization ( APCI) source in positive-ion mode.
采用大气压化学电离源（APCI）正离子模式，实现了黑线姬鼠粪便中4种类固醇化合物的定性及定量测定。