1. Editorial

   • Takao Yotsuyanagi
   • Willie L. Hinze

   EditorialNotes Pages: 1 - 2

2. Synergistic enhancement of the fluorescence intensity of 4,5-benzopiaselenol by surfactants and β-cyclodextrin in aqueous solution

   • Yong-Xi Zheng
   • Dan-Hong Lu

   OriginalPaper Pages: 3 - 9

3. Liquid crystals formed in sodium alkyl sulfates-water systems studied by positron annihilation techniques

   • Rafael Lopez
   • Luz Alicia Fucugauchi
   • J. H. Fendler

   OriginalPaper Pages: 11 - 20

4. Study on the colour reaction of Te-KI-RhB system in the presence of PVA-OP

   • Hongshan Luo

   OriginalPaper Pages: 21 - 26

5. Mixed solubilizers (or dispersing agents) as enhancing agents of color reactions and their analytical applications

   • Wen-Bin Qi
   • Li-Zhong Zhu
   • Hong-Shan Luo

   OriginalPaper Pages: 27 - 36

6. Homogeneous liquid-liquid extraction by pH dependent phase separation with a fluorocarbon ionic surfactant and its application to the preconcentration of porphyrin compounds

   • Shukuro Igarashi
   • Takao Yotsuyanagi

   OriginalPaper Pages: 37 - 44

7. Formation of ternary ion associates using diprotic acid dyes and its application to determination of cationic surfactants

   • Tadao Sakai
   • Noriko Ohno
   • Hideto Sasaki

   OriginalPaper Pages: 45 - 55

8. Spectrophotometric determination of cationic and anionic surfactants with anionic dyes in the presence of nonionic surfactants, part I: A general aspect

   • Shoji Motomizu
   • Mitsuko Oshima
   • Yasuhiro Hosoi

   OriginalPaper Pages: 57 - 66

   

9. Spectrophotometric determination of cationic and anionic surfactants with anionic dyes in the presence of nonionic surfactants, part II: Development of batch and flow injection methods

   • Shoji Motomizu
   • Mitsuko Oshima
   • Yasuhiro Hosoi

   OriginalPaper Pages: 67 - 74

10. Kinetics of complexation of nickel (II) and copper (II) with some azophenol derivatives in aqueous nonionic surfactant solution

    • Kensaku Haraguchi
    • Toshio Ogata
    • Koichi Nakagawa

    OriginalPaper Pages: 75 - 82

11. Distribution of metal chelates between aqueous and surfactant phases separated from a micellar solution of a nonionic surfactant

    • Hiroto Watanabe
    • Tohru Saitoh
    • Kensaku Haraguchi

    OriginalPaper Pages: 83 - 90

12. Solute partition study in aqueous sodium dodecyl sulfate micellar solutions for some organic reagents and metal chelates

    • Tohru Saitoh
    • Nobutoshi Ojima
    • Takao Yotsuyanagi

    OriginalPaper Pages: 91 - 99

13. Spectrophotometric determination of ammonia-nitrogen after preconcentration as indothymol on a glass-fiber filter in the presence of a cationic surfactant

    • Noriko Hata
    • Kaoru Teraguchi
    • Katsumi Goto

    OriginalPaper Pages: 101 - 108

14. Concentration of metal chelate on a membrane filter using surfactant

    • Jun-ichi Itoh
    • Masashi Komata

    OriginalPaper Pages: 109 - 115

15. Enrichment of trace amounts of aluminum using Chrome Azurol S and Chrome Azurol B for solid-state spectrophotometry

    • Kunio Ohzeki
    • Kenji Chiba
    • Ryoei Ishida

    OriginalPaper Pages: 117 - 124

16. Conference calendar

    Events Pages: 125 - 126