Immobilized antibody-based flow type enzyme immunosensor for determination of human serum albumin

Isao Karube, Tadashi Matsunaga, Shuichi Suzuki, Taichi Asano, Satoshi Itoh

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A flow-type enzyme immunosensor was prepared for the electrochemical determination of human serum albumin (HSA). The immunosensor was constructed from the immobilized antibody (anti-HSA IgG) reactor and an oxygen electrode. The immunochemical reaction of catalase-labelled antibody with HSA was completed with 30 min. After the immunochemical reaction, hydrogen peroxide solution was injected into the system and a peak current was obtained within 2 min. A linear relationship was observed between the current increase and the logarithm of HSA concentration in the range 10-8-10-6 g ml-1. The minimum measurable concentration was 10-8 g ml-1. The current increase was reproducible with 10% of the relative errors when a sample solution containing 10-7 g ml-1 of HSA was used. The minimum measurable concentration increased to 10-9 g ml-1 when hydrogen peroxide was recycled for 5 min in the reactor system. The immobilized antibody reactor could be reused. HSA in human serum was determined by the system proposed.

Original languageEnglish
Pages (from-to)279-286
Number of pages8
JournalJournal of Biotechnology
Volume1
Issue number5-6
DOIs
Publication statusPublished - 1984
Externally publishedYes

Fingerprint

Immobilized Antibodies
Immunosensors
Antibodies
Serum Albumin
Enzymes
Hydrogen peroxide
Hydrogen Peroxide
Electrodes
Oxygen
Catalase
Immunoglobulin G
Serum

Keywords

  • flow-type immunoreactor
  • human serum albumin
  • immobilized antibody
  • immunosensor

ASJC Scopus subject areas

  • Biotechnology

Cite this

Immobilized antibody-based flow type enzyme immunosensor for determination of human serum albumin. / Karube, Isao; Matsunaga, Tadashi; Suzuki, Shuichi; Asano, Taichi; Itoh, Satoshi.

In: Journal of Biotechnology, Vol. 1, No. 5-6, 1984, p. 279-286.

Research output: Contribution to journalArticle

Karube, Isao ; Matsunaga, Tadashi ; Suzuki, Shuichi ; Asano, Taichi ; Itoh, Satoshi. / Immobilized antibody-based flow type enzyme immunosensor for determination of human serum albumin. In: Journal of Biotechnology. 1984 ; Vol. 1, No. 5-6. pp. 279-286.
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