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Mass Spectrom."],"published-print":{"date-parts":[[2015,12]]},"abstract":"<jats:p>It is well known that superimposition of some positive octopole field will benefit the performance of ion trap mass analyzer. In the radial\u2010ejection linear ion trap (LIT), adding some octopole field component to the main quadrupole field is usually accomplished by stretching the ejection rod pair. In this study, the effect of octopole potential and some other higher order potential on the performance of LIT mass analyzer is investigated. A simple and effective method, which is to add some octopole component by building a LIT with a pair of rectangular electrodes and a pair of semi\u2010circular electrodes, is reported. Its properties were studied by numerical simulations and experiments. The results showed that a certain amount of positive octopole component could be produced by simply adjusting the position and width of the rectangular electrodes. A resolution of over 1200 at <jats:italic>m<\/jats:italic>\/<jats:italic>z<\/jats:italic> 609 (~1600\u2009Da\/s) was observed in this type of LIT. They also performed tandem mass spectrometry well. The device with optimum geometry for ion ejection from rectangular electrodes provided comparable performance to that for ion ejection from semi\u2010circular electrodes. This type of LIT design is easy for fabrication and assembly. Copyright \u00a9 2015 John Wiley &amp; Sons, Ltd.<\/jats:p>","DOI":"10.1002\/jms.3714","type":"journal-article","created":{"date-parts":[[2015,12,4]],"date-time":"2015-12-04T01:48:18Z","timestamp":1449193698000},"page":"1400-1408","source":"Crossref","is-referenced-by-count":14,"title":["Linear ion trap with added octopole field component: the property and method"],"prefix":"10.1002","volume":"50","author":[{"given":"Qiankun","family":"Dang","sequence":"first","affiliation":[{"name":"Shanghai Key Laboratory of Molecular Catalysis and Functional Material, Department of Chemistry and Laser Chemistry Institute Fudan University  Shanghai 200433 China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fuxing","family":"Xu","sequence":"additional","affiliation":[{"name":"Shanghai Key Laboratory of Molecular Catalysis and Functional Material, Department of Chemistry and Laser Chemistry Institute Fudan University  Shanghai 200433 China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaohua","family":"Huang","sequence":"additional","affiliation":[{"name":"Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, College of Chemistry and Materials Science Nanjing Normal University  Nanjing 210046 China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiang","family":"Fang","sequence":"additional","affiliation":[{"name":"National Institute of Metrology  Beijing China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rizhi","family":"Wang","sequence":"additional","affiliation":[{"name":"Shanghai Key Laboratory of Molecular Catalysis and Functional Material, Department of Chemistry and Laser Chemistry Institute Fudan University  Shanghai 200433 China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chuan\u2010Fan","family":"Ding","sequence":"additional","affiliation":[{"name":"Shanghai Key Laboratory of Molecular Catalysis and Functional Material, Department of Chemistry and Laser Chemistry Institute Fudan University  Shanghai 200433 China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2015,11,17]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"crossref","DOI":"10.1201\/9781420083729","volume-title":"Practical Aspects of Trapped Ion Mass Spectrometry, Vol. IV: Theory and Instrumentation","author":"March R. 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