Development of ion attachment mass spectrometry and its applications

Mass spectrometric investigation of high-mass neutral species in the downstream region of Ar/CH4 plasmas

“…Under an operating pressure of 100 Pa, where third-body collisions play a crucial role in the stabilization of the Li þ adducts, the sensitivity in the Li þ attachment mass spectrometer increases 6.3 times per 0.1 eV of Li þ affinity with an increase in Li þ affinity within a range of 0.3-1 eV, and becomes constant above a Li þ affinity of 1 eV. 28 Such dependence of the sensitivity on the Li þ affinity would be changed under the condition of 1 Pa because, especially in the case of small species, the dissipation of excess energy in the formation of Li þ adducts toward vibrational motions in the adducts is not expected to be enough to stabilize the adducts. Therefore, it is extremely difficult to accurately calibrate the sensitivity of the small species in the low-pressure Li þ attachment mass spectrometer.…”

“…It has been found that the collisions between Li þ and neutral species exclusively lead to the production of Li þ adducts in the cases of hydrocarbons, 28 perfluorocarbons, 28,29 and ketones, 30,31 when the collision energy corresponds to room temperature. The exception is reported only in the case of C 3 H 7 Cl.…”

Analysis of Additives in Plastics

“…Thus, a technique that avoids formation of fragment ions is desirable in mass spectrometric analysis. One such technique is "ion attachment mass spectrometry" [47].…”

Thermal Decomposition Behavior of a Chelating Resin Immobilizing Carboxymethylated Polyethyleneimine: Possibility of Estimation of Carboxymethylation Rate

“…[16][17][18][19][20][21] Recently, fragment-less ionization techniques, such as photo ionization and ion attachment ionization, has attracted attention. 20,[22][23][24][25] When such ionization techniques are applied, a thermalfragment peak in the obtained mass spectrum derives from a compound; therefore, chromatographic separation of compounds evolved from a sample in thermal decomposition is not required. The discrimination of styrene random/block copolymer has been conducted using thermogravimetry-differential thermal analysis/photo ionization-quadrupole mass spectrometry (TG-DTA/PI-QMS).…”

“…The discrimination of styrene random/block copolymer has been conducted using thermogravimetry-differential thermal analysis/photo ionization-quadrupole mass spectrometry (TG-DTA/PI-QMS). 26 An ion attachment ionization-quadrupole mass spectrometry equipped with direct inlet probe (DIP/IA-QMS) has been applied to analyze poly(vinyl alcohol) (PVA), 27 PVA-methylcellulose binder, 28 and polybrominated diphenyl ethers, 22 to discriminate vegetable oils 30 and coffee species, 31 and to estimate the thermal decomposition process of polystyrene. 25 In CM-PEI resin, the CM-PEI group exists on the surface of the porous methacrylate resin.…”