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Modified micro dumas method employing raney nickel
592
ABSTRACTS
micro amounts of released hydrogen halides by means of indicator paper. procedure for revealing the presence of effective organic acids is discussed.
A
and arsenic acids, F. Feigl and E. Jungries, Takmta, 1, 367-68 (1958). A reliable preliminary test for aromatic compounds containing oxygen in the nucleus or in a side chain is discussed which can be successfully conducted within the bounds of spot test analysis. Spot test detection of phenylhydrazine
The determination of metals in organic compounds by the closed jlask method, R. Belcher, A. M. G. Macdonald, and T. S. West, Talanta, 1, 408-11 (1958). The closed oxygen flask method has been extended to the determination of sulfur and halogens in compounds containing Zn, Cd, Mg, B and As. This method shows promise for some organo-metallic compounds but at present, is not considered generally applicable. The gravimetric semi micro determination of phosphorous as quinoline phosphomolybdate, in organic wmpounds, T. R. F. W. Fennel1 and J. R. Webb, Talanla,
2, 105-108 (1959). A gravimetric finish has been applied to the semimicro determination of Pin organic compounds after fusion with Na202. Simultaneous determination of carbon, hydrogen, and nitrogen, U. S. Atomic Energy Comm., UCRL-5134 (1958). C, H, and N simultaneously in 3-5 mg. of solid organic compounds containing and halogens by heating at 900-1000°C. in a sealed quartz tube volumetric determination.
J. W. Frazer, are determined C, H, N, 0, S, and subsequent
Microdetermination of cholesterol in blood, V. M. Dil’man, Voprosy Med. Khim., 4, 165-68 (1958). Calorimetric measurement (at 560 mr.) of cholesterol in 0.1 ml. blood is described.
Microcolorimetric determination of antimony in organic antimony compounds, Y. Kinoshita, Yakugaku Zasshi, 78,315-18 (1958). The decomposed solution is extracted with isopropyl ether and determined by the measurable color is produced with Rhodamine B. Simultaneous microdeterminalion of carbon, hydrogen, su@, and halogen, R. Fujimoto, Y. Utsui, and S. Ose, Yakugaku Zasshi, 78,722-25 (1958). Following combustion, the SO2 and halogen are adsorbed on Ag, then weighed, the AgzSO, is dissolved, and reweighing gives the halogen remaining. The CO2 and Hz0 are absorbed in tubes as usual. Modified micro Dumas melhod employing Raney nickel, S. Mizukami, K. Miyahara, and K. Numoto, Yakugaku Zasshi, 78,842-45 (1958). Raney Ni allows reduction of nitrogen oxides without dissociating CO, to CO and 0, as may happen with Cu at temperatures above 600°C.
Determination of glycols by polarography, K. Takiura and K. Koizumi, Yakugaku Zasshi, 78, 961-64 (1958). A method for microdetermination of glycols is MICROCHEMICAL
JOURNAL,
VOL.
III,
ISSUE
4
ABSTRACTS
micro amounts of released hydrogen halides by means of indicator paper. procedure for revealing the presence of effective organic acids is discussed.
A
and arsenic acids, F. Feigl and E. Jungries, Takmta, 1, 367-68 (1958). A reliable preliminary test for aromatic compounds containing oxygen in the nucleus or in a side chain is discussed which can be successfully conducted within the bounds of spot test analysis. Spot test detection of phenylhydrazine
The determination of metals in organic compounds by the closed jlask method, R. Belcher, A. M. G. Macdonald, and T. S. West, Talanta, 1, 408-11 (1958). The closed oxygen flask method has been extended to the determination of sulfur and halogens in compounds containing Zn, Cd, Mg, B and As. This method shows promise for some organo-metallic compounds but at present, is not considered generally applicable. The gravimetric semi micro determination of phosphorous as quinoline phosphomolybdate, in organic wmpounds, T. R. F. W. Fennel1 and J. R. Webb, Talanla,
2, 105-108 (1959). A gravimetric finish has been applied to the semimicro determination of Pin organic compounds after fusion with Na202. Simultaneous determination of carbon, hydrogen, and nitrogen, U. S. Atomic Energy Comm., UCRL-5134 (1958). C, H, and N simultaneously in 3-5 mg. of solid organic compounds containing and halogens by heating at 900-1000°C. in a sealed quartz tube volumetric determination.
J. W. Frazer, are determined C, H, N, 0, S, and subsequent
Microdetermination of cholesterol in blood, V. M. Dil’man, Voprosy Med. Khim., 4, 165-68 (1958). Calorimetric measurement (at 560 mr.) of cholesterol in 0.1 ml. blood is described.
Microcolorimetric determination of antimony in organic antimony compounds, Y. Kinoshita, Yakugaku Zasshi, 78,315-18 (1958). The decomposed solution is extracted with isopropyl ether and determined by the measurable color is produced with Rhodamine B. Simultaneous microdeterminalion of carbon, hydrogen, su@, and halogen, R. Fujimoto, Y. Utsui, and S. Ose, Yakugaku Zasshi, 78,722-25 (1958). Following combustion, the SO2 and halogen are adsorbed on Ag, then weighed, the AgzSO, is dissolved, and reweighing gives the halogen remaining. The CO2 and Hz0 are absorbed in tubes as usual. Modified micro Dumas melhod employing Raney nickel, S. Mizukami, K. Miyahara, and K. Numoto, Yakugaku Zasshi, 78,842-45 (1958). Raney Ni allows reduction of nitrogen oxides without dissociating CO, to CO and 0, as may happen with Cu at temperatures above 600°C.
Determination of glycols by polarography, K. Takiura and K. Koizumi, Yakugaku Zasshi, 78, 961-64 (1958). A method for microdetermination of glycols is MICROCHEMICAL
JOURNAL,
VOL.
III,
ISSUE
4