The support used was a glass plate with a surface area of 50 X 50 cm. 3 ml of the “Moldy” synthetic malodour (made by Sensenet) was applied using a pasteur pipette directly on the support, in liquid form. The bracket was introduced into a 1 m3 Nalophane™ test chamber with a slight air change (90L/h), to get closer to the real ventilation conditions of a room.
The hydrogen peroxide solution 7,0% solution in a sprayer, was applied in a way that covered the entire surface of the glass surface.
A sample at T=0 min after application of the malodour and then two samples at T=30 min and T=2H after application of the spray were taken according to the lung chamber principle and recovered in a 40L Nalophan™ bag for olfactometric analyses.
The analyses were carried out according to EN13725 : “Air quality – Determination of odour concentration by dynamic olfactometry”, according to a panel of 6 people previously selected.
RESULTS:
Conclusion:
The prototype SW allows, in the conditions test, a reduction of the “Moldy” odour: