Photomicrobial sensors for selective determination of phosphate

Tadashi Matsunaga*, Toshihiko Suzuki, Ryuzo Tomoda

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


A photomicrobial sensor consisting of immobilized Chlorella vulgaris and an oxygen electrode has been developed for selective determination of phosphate. When 40 mM phosphate was added to the sensor system, the photocurrent increased to a maximum under light irradiation with a response time of 1 min. The current increased with increasing phosphate concentration in the range 8-70 mM. Selectivity of the sensor was satisfactory. Good agreement was obtained between the phosphate concentrations in lake water determined by the photomicrobial sensor and by conventional colorimetry (correlation coefficient 0.96).

Original languageEnglish
Pages (from-to)355-358
Number of pages4
JournalEnzyme and Microbial Technology
Issue number8
Publication statusPublished - 1984
Externally publishedYes


  • electrode
  • immobilized Chlorella
  • Phosphate determination
  • photosynthetic microorganisms
  • sensor

ASJC Scopus subject areas

  • Biotechnology
  • Biochemistry
  • Applied Microbiology and Biotechnology


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