巻号一覧
25 巻 (1977)
- 4 号 p. 263-
- 3 号 p. 199-
- 2 号 p. 117-
- 1 号 p. 1-
25 巻, 2 号
選択された号の論文の8件中1～8を表示しています
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蟻川 達男1977 年 25 巻 2 号 p. 117-139
発行日: 1977/07/31
公開日: 2010/06/28
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SHUNROKU TAYA, SADAYUKI OKUDAIRA, ICHIRO KANOMATA, TAMOTSU NODA, HISAS ...1977 年 25 巻 2 号 p. 141-152
発行日: 1977/07/31
公開日: 2010/06/28
ジャーナル フリーA portable double focusing mass spectrometer is constructed for gas analyses. The apparatus consists of a simple homogeneous magnet having rectangular pole pieces(rm=15cm, φ m=30°, ε1=ε2=15°), a double quadrupole lens and a parallel plate condenser. The total ion path length is40cm, and the weight of the magnet is only8.5kg. Adjustment of the double focusing condition is achieved by changing the electric lenses without any mechanical adjustment. The maximum resolving power obtained is600with a10%valley separation with a10μm ion source slit for an accelerating voltage of1.9kV. Transmission rate is obtained at13% for a5mm magnet gap, and a mass range of360is realized.抄録全体を表示PDF形式でダウンロード (1134K) -
上蓑 義則, 石塚 紀夫, 中嶋 邦雄, 砂原 広志1977 年 25 巻 2 号 p. 153-159
発行日: 1977/07/31
公開日: 2010/06/28
ジャーナル フリーAn ion microanalyzer was used to determine individual rare-earths in light rareearth oxide mixtures(Y2O3, La2O3, CeO2, Pr6O11, Nd2O3and Sm2O3). Lanthanum in a sample was employed as an internal standard. The relative ion intensities(RI)of each rare-earth to lanthanum(1.0wt%as La2O3)were constant over the concentrations of percent orders as the oxides. Lanthanum in synthetic samples was determined by standard addition method. Other elements in the samples were determined from the concentration of lanthanum, the intensity ratios and RI. When lanthanum for standard addition and sample were mixed in solution state and in powder state, the analytical errors of rare-earths were of0.9to6.9%and of14.0to19.2%, respectively.抄録全体を表示PDF形式でダウンロード (631K) -
Mass Spectra of Pyrazolo[3, 4-d]pyrimidine 5-OxidesMITSUO UCHIDA, TAKEO HIGASHIN, EISAKU HAYASHI1977 年 25 巻 2 号 p. 161-168
発行日: 1977/07/31
公開日: 2011/07/05
ジャーナル フリーMasspectra(MS)of 1-methyl-(I), 4-substituted 1-phenyl-1 H-pyrazolo[3, 4-d]pyrimidine 5-oxides(II)and 1, 5-dihydro1-methylpyrazolo[3, 4-d]pyrimidine-4-one(III)were examined. The possible principle fragmentation of I and II is summarized by the four dissociation paths, that is, the loss of oxygen atom from the molecular ion(M+), the loss of carbon monoxide from the rearranged molecular ion b, the successive losses of hydrogen radical and carbon monoxide from M+, and also the successive losses of hydrogen radical and oxygen atom from M1, ashown in path 1 to 4 in Scheme 1. In MS of II b, the isopropyl group at the 4-position easily dissociates, so that IIb does not undergo the skeletal rearrangement involving path 2 and 3. The one step loss of hydroxy radical from M+ and the loss of nitrogen monoxide from M+are difficult to find in MS of I and II. The pressure dependency is widely observed for many of the fragment ions, especially the ions concerned with path 1 are typical, of the pressure dependency.抄録全体を表示PDF形式でダウンロード (625K) -
MITSUO UCHIDA, TAKEO HIGASHINO, CHIHOKO IIJIMA, NORIAKI SHIMADA1977 年 25 巻 2 号 p. 169-174
発行日: 1977/07/31
公開日: 2011/07/05
ジャーナル フリーMass spectra (MS) of the condensed diazinecarbonitriles such as2-quinoxalinecarbonitrile(I), 4-quinazolinecarbonitrile(II), 1-methyl-(IIIa), 1-phenyl-1H-pyrazolo[3, 4-d]pyrimidine-4-carbonitrile(IIIb), 9-methyl-(IVa)and9-phenyl-9H-purine-6-carbonitrile(IVb)were examined. The initial fragmentation of I and II is the decomposition of diazine ring, that is, the consecutive losses of cyanogen and hydrogen cyanide or those of hydrogen cyanide and two cyano radicals from the molecular ion(M+). MS of III and IV show the similar patterns. The dissociation pattern of III, the consecutive losses of two hydrogen cyanides or those of hydrogen radical, cyanogen and cyano radical from M+, is almost similar to that of IV except for the little difference between IIIa and IVa in the initial dissociation of pyrazole and imidazole ring. For the stability of ring system caused by the effect of the substituent at the 1-position of III or at the 9-position of IV, the relative intensity of (M-·EH)+and(M-HCN)+· Especies in III a or IVa is greater than that in IIIb or IVb, respectively. The main fragmentation of the condensed pyrimidinecarbonitriles such as II, III and IV, is the initial dissociation ofpyrimidine ring with the loss of cyanogen or hydrogen cyanide.抄録全体を表示PDF形式でダウンロード (568K) -
Mass Spectra of PhthalazinecarbonitrilesMITSUO UCHIDA, ETSUO OISHI, TAKEO HIGASHINO, EISAKU HAYASHI1977 年 25 巻 2 号 p. 175-184
発行日: 1977/07/31
公開日: 2011/07/05
ジャーナル フリーMass spectra(MS)of 1-phthalazinecarbonitrile(Ia), 1-substituted 4-phthalazinecarbonitriles(Ib to If)and 1-substituted 1, 2-dihydro-4-phthalazinecarbonitriles(Ig and Ih)were examined. The main fragmentation of Ia proceeds by the expulsion of nitrogen molecule from the molecular ion(M+). In MS of Ib, Ic, Ie and If, the principal dissociation of ring system proceeds by the. expulsion of·N2H radical from M+ or(M-· EH)+ species. When the alkyl substituent at the 1-position is the methyl group(Ib), the intensity of resulting (M-·N2H)+ species is greater than that of(M-HCN)+ species. In turn, when the substituent at the 1-position is the ethyl (Ic), benzyl(Ie)or phenyl(If), the intensity of(M-· H-· N2H)+· species is smaller than that of(M-· H-HCN)+ species. These facts mean that the facility for the ring cleavage by the expulsion of. N2M radical from M+ or(M-· H)+ species is inversely proportional to the relative size of the substituent at the 1-position. Other dissociation of ring system proceeds by the expulsion of carbon and nitrogen at the 1-and 2-positions or at the and 3-positions caused by the scission of bond between adjacet nitrogen atoms at the 2-and 3-positions. The fragmentation of 1-isopropy l-4-phthalazinecarbonitrile(Id)proceeds by the dissociation of isopropyl group. The main fragmentation of Ig and Ih proceeds by the expulsion of the substituent at the1-position to give the cyanophthalazinium ion.抄録全体を表示PDF形式でダウンロード (738K) -
岩村 淳一, 細坪 秀夫, 平尾 子之吉1977 年 25 巻 2 号 p. 185-194
発行日: 1977/07/31
公開日: 2010/06/28
ジャーナル フリーMass spectra of substituted benzaldehydes, substituted benzyl ethyl ethers, diethyl substituted benzaldehyde acetals and substituted benzaldehyde ethylene acetals were measured by electron impact ionization. The substituted group of compounds were H; o-, m-, p-CF3O;o-, m-, p-CH3, and o-, m-, p-CI. The fragmentation patterns were discussed on the basis of the metastable ions and the fragment of isomer.抄録全体を表示PDF形式でダウンロード (572K) -
HIROYUKI KAWANO1977 年 25 巻 2 号 p. 195-197
発行日: 1977/07/31
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (259K)
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