science-softCon uv/vis+ photochemistry database;	www.photochemistry.org; (C) science-softCon 2022

Substance: domoic acid					Other Names: L-domoic acid

Formula: C15H21NO6					CAS-No.: 14277-97-5	PubChem: CID 5282253

Study: photodegradation, quantum yields, uv absorption spectrum

                
Authors: R.-C. Bouillon, T.L. Knierim, R.J. Kieber, S.A. Skrabal, J.L.C. Wright

Title: Photodegradation of the algal toxin domoic acid in natural water matrices

Journal/Source: Limnology and Oceanography, 51 (1), 321-330, (2006); https://doi.org/10.4319/lo.2006.51.1.0321


Data: table, diagram

Energy/Wavelength range: 200 - 400 nm

Resolution: 1 nm

Pathlength:

Temperature: 296 K

Temperature dependence: no

Pressure/Concentration: 6.0 - 302 µmol/L

Phase: deionized water solution

pH: 5.1


Comments: Absorption(max) at 242 nm. The molar absorption coefficient of domoic acid varies from 17.7 to 29.9 L mol-1 cm-1 the UV-B range (280–320 nm) 
and from 2.8 to 17.7 L mol-1 cm-1 the UV-A range (320–400nm). The quantum yield of domoic acid photodegradation in seawater decreased with increasing 
wavelength and decreasing energy of incoming radiation, with the average value ranging from 0.03 to 0.20 in the ultraviolet wavelength range (280–400 nm).