Development of an assay for ozone-specific antioxidant capacity

Joseph M. Rutkowski, Lizzie Y. Santiago, Abdellaziz Ben-Jebria, James S. Ultman

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A method of determining the ozone-specific antioxidant capacity (OZAC) of lavage samples from the respiratory system was developed. Gaseous ozone (O 3) was produced in cuvettes by irradiation with an ultraviolet lamp; aliquots of sample or of a saline control were then added and sufficient time was allowed for ozonation to reach completion; and an aliquot of indigo trisulfonate (ITS) was added to react with excess O3. Because each molecule of O3, rapidly bleaches one molecule of the deeply colored ITS, an OZAC value in concentration units was computed from the difference in light absorbance between the sample and the saline control multiplied by the extinction coefficient of ITS. Experiments in 0-40 μM antioxidant solutions indicated that the OZAC values of uric acid and ascorbic acid were close to their actual concentrations and were independent of O3 concentration. On the other hand, the OZAC of reduced glutathione and possibly human nasal lavage were nonlinearly related to antioxidant concentration and were directly related to O3 concentration.

Original languageEnglish (US)
Pages (from-to)1369-1385
Number of pages17
JournalInhalation Toxicology
Volume15
Issue number13
StatePublished - Nov 2003

Fingerprint

Ozone
Assays
Antioxidants
Indigo Carmine
Nasal Lavage
Respiratory system
Ultraviolet lamps
Molecules
Ozonization
Therapeutic Irrigation
Uric Acid
Respiratory System
Ascorbic Acid
Glutathione
Irradiation
Light
Experiments

ASJC Scopus subject areas

  • Toxicology
  • Health, Toxicology and Mutagenesis

Cite this

Rutkowski, J. M., Santiago, L. Y., Ben-Jebria, A., & Ultman, J. S. (2003). Development of an assay for ozone-specific antioxidant capacity. Inhalation Toxicology, 15(13), 1369-1385.

Development of an assay for ozone-specific antioxidant capacity. / Rutkowski, Joseph M.; Santiago, Lizzie Y.; Ben-Jebria, Abdellaziz; Ultman, James S.

In: Inhalation Toxicology, Vol. 15, No. 13, 11.2003, p. 1369-1385.

Research output: Contribution to journalArticle

Rutkowski, JM, Santiago, LY, Ben-Jebria, A & Ultman, JS 2003, 'Development of an assay for ozone-specific antioxidant capacity', Inhalation Toxicology, vol. 15, no. 13, pp. 1369-1385.
Rutkowski JM, Santiago LY, Ben-Jebria A, Ultman JS. Development of an assay for ozone-specific antioxidant capacity. Inhalation Toxicology. 2003 Nov;15(13):1369-1385.
Rutkowski, Joseph M. ; Santiago, Lizzie Y. ; Ben-Jebria, Abdellaziz ; Ultman, James S. / Development of an assay for ozone-specific antioxidant capacity. In: Inhalation Toxicology. 2003 ; Vol. 15, No. 13. pp. 1369-1385.
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