ISO 13125 pdf download

ISO 13125 pdf download Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method for antifungal activity of semiconducting photocatalytic materials
1 Scope
This International Standard specifies a test method covering the determination ofthe antifungalactivityof materials that contain a photocatalyst or have photocatalytic films on their surface, by counting thenumber of pre-incubated fungal spores that survive exposure to ultraviolet (UV-A) light.
This International Standard provides for the assessment of different kinds on materials used in variousapplications, such as construction materials in flat coating, sheet, board or plate form, etc. Powdergranular, fibrous or porous photocatalytic materials are not included.
Values expressed in this International Standard are in accordance with the International System ofUnits (SI).
2 Normative references
The following referenced documents are indispensable for the application of this document. For datedreferences, only the edition cited applies. For undated references, the latest edition of the referenceddocument (including any amendments) applies.
ISO 27447, Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method for antibacterialactivity ofsemiconducting photocatalytic materials
ISO 4892-3, Plastics — Methods ofexposure to laboratory light sources — Part 3: Fluorescent UV lampsIEC 60068-2-10, Environmental testing – Part 2-10: TestJ and guidance: Mould growth
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.3.1
photocatalvstsubstance that carries out many functions based on oxidization and reduction reactions under Uvrradiation,including decomposition and removal of air and water contaminants, deodorization.antibacterial, antifungal, self-cleaning and antifogging
3.2
photoirradiationirradiation to ultraviolet (UV-A) light at wavelength 300 nm to 400 nm
3.3
photocatalytic materialssurface or material to which a photocatalyst has been applied with the intention of making itphotocatalytically active; photocatalytic treated materials, samples and pieces are included
4 Symbols
S concentration of fungal spores
K average of colony numbers
D dilution factor
F number of surviving spores
V volume of recovery solution
L ultraviolet exposure
A average of colony numbers of photocatalytic non-treated pieces following inoculation
B L average of surviving spore numbers of photocatalytic non-treated pieces at exposure L after several hours
C L average of surviving spore numbers of photocatalytic non-treated pieces at exposure L after several hours
R L antifungal activity value in irradiation condition L
C D average of surviving spore numbers of photocatalytic treated test pieces in the dark after several hours
B D average of surviving spore numbers of photocatalytic non-treated test pieces in the dark after several hours
ΔR antifungal activity value with UV irradiation by removing the effect in the dark
NOTE The term “several hours” means the period of time between 3 h (minimum) and 24 h (maximum).