نتایج جستجو برای: mass spectrometer
تعداد نتایج: 490983 فیلتر نتایج به سال:
چکیده ندارد.
A new approach was recently introduced to improve the structure elucidation power of tandem mass spectrometry simulating the MS(3) of ion trap mass spectrometry system overcoming the different drawbacks of the latter. The fact that collision induced dissociation in the triple quadrupole mass spectrometer system provides richer fragment ions compared to those achieved in the ion trap mass spectr...
Received 1/16/2004; revised 2/27/2004; accepted 3/5/2004. For correspondence and reprints contact: Ping-I Hsu, M.D., Division of Gastroenterology, Department of Internal Medicine, Kaohsiung Veterans General Hospital, 386 Ta-Chung 1st Road, Kaohsiung 813, Taiwan, ROC. Tel: (886)73422121 ext. 2075, Fax: (886)7-3461179, E-mail: [email protected] Background: Infrared spectrometer has been de...
A time-of-flight mass spectrometer (TOF-MS) developed in our laboratory at Isfahan University of Technology is described here. The TOF-MS instrument uses laser as the ionization source which provides an opportunity to investigate the ions formed in laser ablation or desorption. The TOF-MS has an ionization chamber containing an accelerator and an ion lens to focus the ions into a one meter line...
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