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petrol tone

nota di petrolio (I)
goût de pétrole (F)
petrol tone (GB)

Designation (also Juchtenton or Kerosinton) for a characteristic odor and taste in especially white wine. This may not be allowed with the firn (Altersfirn) be confused. Petrol tone is reminiscent of mineral oil (kerosene), kerosene or petrol or tanned Yuchtenleder (leather tanned with birch bark tar material). Mainly the Petrolton occurs at Riesling out physiologically mature Grapes with a high proportion of carotenoids on. This is supported by high exposition (Sunlight), which is why especially Riesling wines from warmer areas, such as South Africa and Australia are affected. In the vineyard, this is due to lower Defoliation and thus trying to prevent greater shading of the grapes. After studies at Klosterneuburger Weinbauinstitut are wines of cooler vintages much less affected.

The cause of the petrol tone is the substance TDN (Trimethyl-dihydronaphthalene), which during the bottle aging by dismantling carotenoids is formed (in young wines TDN is not detectable). Too high temperatures during storage and oxidative Processes by, for example, faulty ones cork or closures can promote education. A connection seems at corked In this regard, a faster and more enhanced formation of petrol tones is observed. To a lesser extent, Petrolton is perceived by certain consumers as pleasant and positive, but generally in Europe rather than negative. On the other hand, it is considered in the New World as a typical sign of ripe Riuesling wines. When exceeding critical Perceptual thresholds with impairment of the fruit flavors, he is at least as wine faults to evaluate. See also under the ages sulfurous off (Lagerböckser) firn (Altersfirn) and UTA (untypical age tone).

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