著者

高島 教一郎 河口 広司 中島 篤之助

出版者

社団法人 日本分光学会

雑誌

分光研究 (ISSN:00387002)

巻号頁・発行日

vol.11, no.1, pp.14-19, 1962

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The evaporation method developed by Mandel' shtam and Zaidel is applied for the determination of impurity elements in uranium oxide.For the evaporation of impurity elements, most favorable sam-ple temperature, duration of heating, sample weight, and gap length between a collector electrode and a crucible are chosen.Calibration curves for the determination of Fe, Cr, Mn, Ni, Cu, B, Si, P and Cd are prepared.In the analyses of B and Cd, AgCl is added to uranium oxide (1%) as a carrier before evaporation and a d.c.arc excitation (10A) is used in the spectrographic procedure.Though the repeatability of analytical results is 10% or so for each element, the values determined for Fe and Ni are considerably deviated from the values obtained by the carrier-distillation method and chemical analysis.The evaporation rate is measured as a function of evaporation temperature for Sb, Fe and Cd by the use of radioactive tracers <SUP>124</SUP>Sb, <SUP>59</SUP>Fe and <SUP>115m</SUP>Cd respectively.

著者

中島 篤之助

出版者

社団法人 日本分光学会

雑誌

分光研究 (ISSN:00387002)

巻号頁・発行日

vol.13, no.5, pp.152, 1965

著者

中島 篤之助 高橋 正雄 河口 広司

出版者

公益社団法人 日本金属学会

雑誌

日本金属学会誌 (ISSN:00214876)

巻号頁・発行日

vol.22, no.11, pp.564-568, 1958

被引用文献数

1

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A method has been developed for the determination of rare earth elements including yttrium in uranium and its compounds. The greater portion of the uranium is separated from the rare earths by ether extraction. The rare earths are then precipitated as fluorides and subsequently purified as hydroxides. Lanthanum was used as the carrier. The efficiency of the above separation procedures was studied by means of the radioactive tracer Eu<SUP>152+154</SUP>. The final determination was carried out spectrographically by the copper-spark method. Five rare earth elements which showed extremely high neutron absorption were investigated, and their limits of detection (sensitivity) and recoveries from U<SUB>3</SUB>O<SUB>8</SUB> are reported.

著者

福島 弘之 中島 篤之助

出版者

社団法人 日本分光学会

雑誌

分光研究 (ISSN:00387002)

巻号頁・発行日

vol.19, no.1, pp.38-42, 1970

著者

中島 篤之助 高橋 正雄 森下 益孝

出版者

一般社団法人 日本原子力学会

雑誌

日本原子力学会誌 (ISSN:00047120)

巻号頁・発行日

vol.3, no.2, pp.104-109, 1961

被引用文献数

2

---

Two procedures are described for the sensitive spectrographic determination of 0.023 ppm of boron in graphite for nuclear reactor. In the first method, preliminary concentration is carried out by the removal of the graphite by ashing in the presence of La₂O₃. Then the contents of boron in La₂O₃ are determined by the carrier-distillation method. In the second method, the sample in the form of powder is compressed into pellets with the aid of a phenol-formaldehyde resin as binding medium, and these are arced at 7 A (d.c.). By means of display microphotometry, the peak height of B at 2497.73 &Aring; is compared with that of the NO(&gamma;) band component at 2497.14 &Aring;.

著者

中島 篤之助

出版者

日本共産党中央委員会

雑誌

前衛 (ISSN:13425013)

巻号頁・発行日

no.615, pp.p194-215, 1992-01

著者

長島 弘三 中島 篤之助

出版者

公益社団法人 日本分析化学会

雑誌

分析化学 (ISSN:05251931)

巻号頁・発行日

vol.9, no.13, pp.3R-10R, 1960

被引用文献数

2

著者

中島 篤之助

出版者

日本科学者会議

雑誌

日本の科学者 (ISSN:00290335)

巻号頁・発行日

vol.28, no.6, pp.p350-356, 1993-06

著者

中島 篤之助 渋谷 正吾

出版者

社団法人 日本分光学会

雑誌

分光研究 (ISSN:00387002)

巻号頁・発行日

vol.2, no.8, pp.14-21, 1954

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A simple controlled spark apparatus, based on the Maresca-Simons-Raiskij scheme, was constructed. In spite of its simplicity, experiments have given very high accuracy of analytical results. Several factors which may influence the reproducibility of the analytical results were investigated using Industrial Research Quantometer (A. R. L.) and ordinary photographic procedure. As a results, reproducibility of 2.4% expressed as standard deviations was obtained for the analysis of Ni in nickel-steel, wheseas 3.5% had obtained using high voltage spark supplied from High Precision Source Unit. This improvement in accuracy however, may mainly due to the difference of vaporization processes, although the stability of this apparatus had been clearly indicated by the stability of so-called arc to spark line ratio particularly.<BR>Low cost and easy maintenace are also the excellent features of this apparatus.

著者

中島 篤之助

出版者

阪南大学

雑誌

阪南論集 社会科学編 (ISSN:03881814)

巻号頁・発行日

vol.33, no.3, pp.39-48, 1998-01

著者

石田 良平 中島 篤之助 小泉 武二

出版者

社団法人 日本分光学会

雑誌

分光研究 (ISSN:00387002)

巻号頁・発行日

vol.6, no.3, pp.15-21, 1957

---

Application of Quantometer to routine analysis of low alloy steel is studied . As the operation was continued all day long, instrumental conditions became stabilized more and more with ever improving results. As for the standardization, once for every set of 200 samples seemed enough for accurate analysis. In the case of multisource spark-like condition, Quantometer is far more reliable than a rapid chemical analysis. At a high concentration range, chemical analysis gives higher accuracy than, quantometric analysis, but at a low concentration range, the reverse is the case. Owing to some particular phenomenon, prespark longer than 40 seconds was necessary for the analysis of nitriding steel. Molybdenum spectrum line of 2816A is affected by alminium spectrum line and can not be used;better results were obtained by the use of 2848A line of molybdenum . Chrominium lines is probably affected by the presence of aluminium, and analytical results were 24% too high on the average. This could possibly be lowered by renewing the graphite electrode .

著者

中島 篤之助

出版者

岩波書店

雑誌

科学 (ISSN:00227625)

巻号頁・発行日

vol.49, no.5, pp.p314-324, 1979-05

著者

中島 篤之助

出版者

毎日新聞社

雑誌

エコノミスト (ISSN:00130621)

巻号頁・発行日

vol.59, no.16, pp.p42-48, 1981-04-21

著者

中島 篤之助

出版者

日本科学者会議

雑誌

日本の科学者 (ISSN:00290335)

巻号頁・発行日

vol.14, no.5, pp.p261-267, 1979-05

著者

加藤 金治 高島 教一郎 中島 篤之助

出版者

社団法人 日本分光学会

雑誌

分光研究 (ISSN:00387002)

巻号頁・発行日

vol.25, no.6, pp.293-298, 1976

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In the atomic absorption spectrophotometry using an air-acetylene flame, both titanium and niobium existing as peroxo-complex compounds (presumably peroxo-) in nickel-base alloy sample solution seriously interfere with the determination of copper, manganese, and cobalt. Obtained absorbance readings for these elements show random values.<BR>The following two dissolution treatments have been examined: 0.5 g portions of the sample are dissolved in (1) HNO<SUB>3</SUB> (5 m<I>l</I>) +HCl (5 m<SUB>l</SUB>) +HF (1 m<SUB>l</SUB>), (2) 3N-H<SUB>2</SUB>SO<SUB>4</SUB> (25 m<I>l</I>) +HCl (10 m<I>l</I>) +H<SUB>2</SUB>O<SUB>2</SUB> (10 m<I>l</I>), and the solutions are diluted exactly to 100 m<I>l</I> with water. In the former, no interference effect is observed. In the latter, irregular absorbance readings are obtained for copper, manganese, and cobalt. No interference effect is observed, however, when a nitrous oxide-acetylene flame is used.<BR>The mechanism of the interference effects has been investigated by using an especially prepared twin-nebulizer. From the result, it is concluded that the origin of the interference effects can be attributed to the vaporization behavior of wet aerosols. Probably, these aerosols make refractory compounds in the air-acetylene flame and the compounds occlude copper, manganese, and cobalt and the incomplete dissociation of these compounds traversing the flame zone causes the irregular absorbance readings.

著者

高島 教一郎 中島 篤之助 河口 広司 大内 義彦

出版者

社団法人 日本分光学会

雑誌

分光研究 (ISSN:00387002)

巻号頁・発行日

vol.18, no.5, pp.262-267, 1969

被引用文献数

5

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A direct, quantitative analytical technique for the analysis of gadolinium, dysprosium, europium and samarium in aluminum oxide using the X-ray-excited optical fluorescence spectra is described.<BR>Rare earth elements were coprecipitated with host aluminum from acid solution as aluminum hydroxide. Precipitated hydroxide was dried after centrifugal separation and then heated in a muffle furnace at 1000&deg;C for 2 hours. These oxides were then heated at 1450&deg;C in an electric resistance furnace for 60 seconds.<BR>Such an impulsive heating followed by quenching, described above, prominently enhances the luminescent intensities of rare earth elements. It was shown by the X-ray diffraction method that the crystal of Al<SUB>2</SUB>O<SUB>3</SUB> were transformed from &gamma;r-type oxide to the stable &alpha;-type oxide during the above heat treatment.<BR>Concentrations of gadolinium, dysprosium, samarium, europium have been determined by this method with detection limits ranging from 0.05 to 1.0ppm. Reproducibility was found to be 5-10%.The enhancement and suppression effect due to iron, silicon and copper were investigated and discussed.

著者

中島 篤之助

出版者

一般社団法人 日本物理学会

雑誌

年会講演予稿集

巻号頁・発行日

vol.41, pp.107-108, 1986

著者

中島 篤之助 白石 裕子

出版者

社団法人 日本分光学会

雑誌

分光研究 (ISSN:00387002)

巻号頁・発行日

vol.1, no.4, pp.23, 1953

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A high voltage a. c. arc source unit of usual type was constructed in order to develop the spectrochemical methods of trace elements in iron and steel. This arc supply consists of a power transformer having a 220 volt primary and two 2200 volt secondaries, each capable of supplying 2.2 amperes. A switching system allows the secondaries to be hooked inseues or parallel, so that two voltage ranges are available; 2200 and 4400.<BR>Seventy heater type coils wounded by 0.5 mm &ldquo;Advance&rdquo; wire are used as a ballast resistors in the secondaries and permit one to control the current from ampere to ampere at 4400 volt range and from to ampere at 2200 volt range.<BR>The arc stand in locked into safety cage and the door of this cage act, as a switch preventing the current to flow into trasformer primary when this door is opening.

著者

中島 篤之助

出版者

工業技術院機械試験所

雑誌

機械試験所所報 (ISSN:03884244)

巻号頁・発行日

vol.7, no.5, pp.197-201, 1953-09

著者

中島 篤之助

出版者

新日本出版社

雑誌

季刊科学と思想 (ISSN:02877384)

巻号頁・発行日

no.72, pp.p1108-1130, 1989-04