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Dive into the research topics where Masao Kajikawa is active.

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Featured researches published by Masao Kajikawa.


Bunseki Kagaku | 1965

Fine structures of X-ray CoK absorption spectra of various cobalt compounds

Nobukazu Okamoto; Akimitsu Kobayashi; Masao Kajikawa; Keishi Hasegawa

X線K吸収端スペクトルが物質の化学構造や原子価に関係があり,微細構造のプロフィルおよび振幅の位置から構造化学分析を行なうことができる.微細構造を測定するためには,高分解能および高精度を必要とするため,従来,複結晶分光系が使用されており,また電源,計数回路の安定性,試料調製法などに技術的な面で問題があった.著者らはトパズ単結晶を使用し,強度測定法および試料作成法を検討した結果,単一結晶分光系を使用して,従来の方法とほぼ同程度の分解能で精度よく測定できる経験的な条件を確立することができた.この条件により種々のコバルト化合物について吸収端スペクトルを測定した.その結果,主吸収端および第1振幅は一般に大差なく,微細構造はコバルトの第1近傍の原子に依存することが認められた.コバルト低濃度試料(2~3%)にっいては,励起出力を上げ,主吸収端から数十eV以内のスペクトルを用いてコバルトの形態を確認することができた.


Journal of The Japan Petroleum Institute | 1960

Analysis of Sulfide Compounds in ARAMCO Crude. (II)

Yuzo Koga; Masao Kajikawa; Masaru Kawaguchi

The distribution of aliphatic sulfides in the heavy naphtha, kerosene and light gas oil fraction of ARAMCO crude was studied by spectrophotometry of sulfide-iodine complex according to the same method as the first report, and the limit of application for this method was determined.The results obtained were as follows;Fraction Aliphatic Sulfide Sulfur (wt.%) % in total SulfurLight Naphtha 0.009 37Heavy Naphtha 0.061 74Kerosene 0.143 75Light Gas Oil 0.184 20Moreover, it was found that this method should be applied to the fraction lighter than the light gas oil (B. P.: 246 to 316°C; M. W.: approx. 210) of ARAMCO crude.


Journal of The Japan Petroleum Institute | 1977

Relations between Hydrocarbon-Type Composition of Various Kerosene Distillates and Their Properties

Masao Kajikawa; Takeshi Isoda; Tadao Amari; Masaru Kawaguchi


Journal of The Japan Petroleum Institute | 1972

Determination of Total Nitrogen in Petroleum by Microcoulometry

Masao Kajikawa; Masaru Kawaguchi; Tadao Amari; Kaoru Watanabe


Nippon Kagaku Kaishi | 1966

X-Ray K Absorption Edge Spectra of Various Cobalt Complexes

Nobukazu Okamoto; Masao Kajikawa; Keishi Hasegawa


Bunseki Kagaku | 1964

Rapid method of simultaneous determination of sulfur, calcium, and barium in lubricating oils by fluorescent X-ray

Keishi Hasegawa; Masao Kajikawa; Nobukazu Okamoto


Bulletin of The Japan Petroleum Institute | 1964

Analysis of Anti-Icing Additives in Jet Fuel by Infrared Spectrophotometry

Keishi Hasegawa; Masao Kajikawa; Masaru Kawaguchi; Tamotsu Nishijima


Journal of The Japan Petroleum Institute | 1972

Analytical Consideration on the Relation between Color Stability and Nitrogen Compounds of Hydrofined Kerosene (Part 1)

Masao Kajikawa; Masaru Kawaguchi


Bunseki Kagaku | 1969

Carbon and hydrogen analysis of petroleum products using Perkin Elmer Model 240

Masao Kajikawa; Tadao Amari; Chuji Fukushima


Bunseki Kagaku | 1964

Determination of carbon and hydrogen in hydrocarbon by the coherent to the incoherent scattering intensity ratio

Keishi Hasegawa; Masao Kajikawa; Nobukazu Okamoto; Eiichi Asada

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