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- Title
Odour Detection Threshold Determination of Volatile Compounds in Topical Skin Formulations.
- Authors
Thomsen, Birgitte R.; Hyldig, Grethe; Taylor, Richard; Blenkiron, Peter; Jacobsen, Charlotte
- Abstract
Several studies have shown that lipid oxidation can occur in topical skin formulations, but the impact of the individual volatile compounds on off‐odour has not yet been determined. In this study, lipid oxidation is investigated in prototype skin care formulations. Firstly, lipid oxidation volatile compounds that increased in concentration during storage are identified. The results show that the concentration of six volatile compounds increased above previously reported odour detection threshold values in water. These volatile compounds are selected for odour detection threshold value determination and also odour description by a trained sensory panel. In one case, the odour detection threshold value is 50 times higher (less detectable) in skin care products than in water, whereas for other volatile compounds the odour detection threshold value is only 1.5 times higher. The odour description of the volatile compounds is, in most cases, different from that reported in literature. The observed differences are hypothesised to be due to a masking effect of the base odour of the skin care product(s), a volatile‐retaining power of the base matrix and to a cocktail effect of the combined odours from different volatile oxidation products. <italic>Practical Application</italic>: In this study, the impact of volatile compounds on off‐odour is explored in prototype skin care formulations. The odour detection threshold value and odour description are determined for butanal, pentanal, 3‐methyl‐1‐butanol, 2‐ethyl furan, 2‐pentyl furan and 1‐heptanol in prototype skin care formulations. Overview of the different odour descriptors of the same volatile (3‐methyl‐1‐butanol) when found in topical skin formulations with different lipid contents.
- Subjects
VOLATILE organic compounds; LIPIDS; OXIDATION; SKIN care products; BUTYRALDEHYDE; HEPTANOL
- Publication
European Journal of Lipid Science & Technology, 2018, Vol 120, Issue 5, p1
- ISSN
1438-7697
- Publication type
Article
- DOI
10.1002/ejlt.201700231