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Simulating latrine conditions to assess perfume performance against malodour
Charles Jean-François Chappuis1, Robin Huber1, Yvan Niclass1
1Corporate R&D Division Firmenich SA Geneva Switzerland.
Flavour and Fragrance Journal
|July 24, 2018
Summary
This study developed a model toilet to test perfume effectiveness against malodours. Perfumes can reduce unpleasant smells, with climate affecting odour perception.
Area of Science:
- Environmental Science
- Sensory Science
- Chemical Engineering
Background:
- Toilet malodour presents a significant challenge in public and private spaces.
- Controlling malodour requires understanding its chemical composition and perception under various conditions.
Purpose of the Study:
- To develop a controlled experimental setup for evaluating perfume performance in mitigating toilet malodours.
- To investigate the impact of climate on the perception of malodours and perfume efficacy.
Main Methods:
- Construction of model toilets with controlled background malodour, climate, and airflow.
- Injection of key malodorous compounds (hydrogen sulfide, methyl mercaptan, etc.) to replicate toilet headspace.
- Validation of malodour reconstitution using chemical and sensory analysis.
- Assessment of olfactory stimuli perception under varying temperature and humidity levels.
Main Results:
- Increasing temperature and humidity reduced the intensity of perceived odours without changing their quality.
- Perfume delivery methods (forced evaporation, pads, liquids, powders) were evaluated for headspace control.
- Dose-response curves were established to quantify perfume performance in malodour reduction and pleasantness enhancement.
Conclusions:
- The model toilet system provides a reliable platform for assessing perfume efficacy in toilet environments.
- Climate significantly influences odour perception, a critical factor for effective malodour control strategies.
- Perfumes can be effectively utilized to manage toilet malodours and improve user experience.
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