کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1689357 1011225 2007 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High-pressure mass spectrometric investigations of ion–molecule reactions in hydrogen sulfide and ammonia mixtures
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سطوح، پوشش‌ها و فیلم‌ها
پیش نمایش صفحه اول مقاله
High-pressure mass spectrometric investigations of ion–molecule reactions in hydrogen sulfide and ammonia mixtures
چکیده انگلیسی

The positive ion–molecule reactions in the mixtures of hydrogen sulfide and ammonia have been examined by means of quadrupole mass spectrometer with high-pressure ion source. The concentration of hydrogen sulfide in mixtures ranged from 10% to 90% with 10% increment. Mainly observed primary ions: NH2+ (m/q=16), NH3+ (m/q=17), S+ (m/q=32) and H2S+ (m/q=34) were formed as the result of ionization and dissociative ionization by electrons with energy of 300 eV. For each mixture, major bimolecular ion–molecule reactions have been identified at total pressure from 0.5 to 33.3 Pa. The main secondary ions: NH4+ (m/q=18), H3S+ (m/q=35) and NH3S+ (m/q=49) were observed.Relative intensities of ion currents for observed ions were determined as a function of total gas pressure inside ion source collision chamber, repeller potential and concentration of hydrogen sulfide in the mixture.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vacuum - Volume 81, Issue 10, 15 June 2007, Pages 1393–1397
نویسندگان
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