B U N S E K I K A G A K U

Vol. 50 No. 4

April, 2001

Table of Contents

Research Papers

Rapid Discrimination of Polyethylene Grades by Combining a Near-Infrared Spectra Measurement and a Neural Network Analysis

Kazumitsu Saeki, Takatoshi Matsumoto, Kazutoshi Tanabe and Toshio Amano 223

Research on the Mass-Determination Method of As Content in Soil Samples by Its Capability Concerning for the Microwave Digestion Method and Epithermal Neutron Activation Analysis

Yoshitsugu Shinozuka and Kazuhiro Toyoda 229

Development of a Characterization Method for Environmental Aerosol Particles Including Diesel Exhaust Particles

Bunbunoshin Tomiyasu, Takashi Ogura, Hayato Takeuchi, Masanori Owari and Yoshimasa Nihei 237

Identification and Quantitation of Steroid Hormones in Marine Gastropods by GC/MS

Ming Lu, Toshihiro Horiguchi, Hiroaki Shiraishi, Yasuyuki Shibata, Mitsuru Abo, Akira Okubo and Sunao Yamazaki 247

Synthesis of a Thermo-Sensitive Copolymer with Hydroxamic Acid Group and Its Characteristics of Metal- Ion Collection

Kazuyo Tagusari, Nobuo Uehara and Tokuo Shimizu 257

Technical Papers

Addition of Iron(III) Oxide in the Alkali Fusion of Silicon Carbide Prepared by Chemical Vapor Deposition for a Highly Precise Determination of Total Silicon

Mitsuyoshi Watanabe 263

Determination of Cobalt in Iron and Steel by Reversed- Phase HPLC Using 2-(5-Bromo-2-pyridylazo)-5-[N-n-propyl-N-(3-sulfopropyl)amino]phenol Chelate as a Precolumn Derivatizing Reagent

Kazuhiro Yamaguchi, Nobuo Uehara, Ikuto Hiramatsu and Tokuo Shimizu 267

Rapid Determination of Multi-Elements in Geochemical Samples by Microwave Acid Digestion ICP-AES

Masayuki Minakawa and Mitsuo Uematsu 273

Notes

Spectrophotometric Determination of Nonionic Surfactants in Environmental Water Samples after Solid-Phase Extraction

Hiroyuki Kamiguchi and Sadamitsu Shiode 281

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