FPA of selected odorous compounds

Rashash, Diana; Dietrich, Andrea M.; Hoehn, Robert C.

doi:10.1002/j.1551-8833.1997.tb08213.x

Cited by 64 publications

(47 citation statements)

References 24 publications

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“…3 (a). Some typical polyunsaturated fatty acid (PUFA) derivatives, including 2,4-heptadienal, 2,6-nonadienal, and 2,4-decadienal, are reportedly associated with fishy/oily/cucumber odors (Rashash et al, 1997;Hartvigsen et al, 2000). According to previous studies, Dinobryon (Watson et al, 2001;Zhao et al, 2013), Melosira (Wendel and Juttner, 1996), Synura (Wee et al, 1994), and Uroglena (Watson and Satchwill, 2003) can produce these unsaturated aldehydes.…”

Section: Evaluation Of Typical Odorous Compoundsmentioning

confidence: 99%

“…The OAVs for the detected aldehydes were all below 0.15, except for nonanal (0.20e1.03), which is reportedly associated with fruity odor (Cotsaris et al, 1995), indicating that these compounds might have less impact on fishy odors. However, Rashash et al (1997) revealed that interferences (e.g. masking, antagonism, or synergism) exist among compound mixtures, and subthreshold concentrations of some odorous compounds may contribute to overall perception.…”

Section: Evaluation Of Typical Odorous Compoundsmentioning

confidence: 99%

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Source-water odor during winter in the Yellow River area of China: Occurrence and diagnosis

Guo

et al. 2016

Environmental Pollution

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a b s t r a c tYellow River source water has long suffered from odor problems in winter. In this study, odor characteristics, potential odorants, and algae in the source water of six cities (Lanzhou, Yinchuan, Hohhot, Zhengzhou, Jinan and Dongying) along the Yellow River were determined in winter (February to March 2014). According to flavor profile analysis (FPA), moderate to strong fishy odors occurred in all cities, except for Lanzhou. At the same time, mild earthy/musty odors and septic/swampy odors were also detected. The strong fishy odor (FPA intensity, 8.5) in Yinchuan was attributed to the abnormal growth of Dinobryon (cell density, 5.7 Â 10 4 cells/mL), while the fishy odors in Hohhot, Zhengzhou, Jinan, and Dongying might be caused by Melosira and Cyclotella, Cryptomonas, Dinobryon, and Synedra, respectively. Unsaturated aldehydes, which have been reported to cause fishy odors, were not detected in all samples. However, some saturated aldehydes, including hexanal, heptanal, nonanal, decanal, and benzaldehyde, were detected with a total concentration range of 690 ng/L to 2166 ng/L, and might have partly contributed to the fishy odors. In addition, 2-MIB (5.77e21.12 ng/L) and geosmin (2.26e9.73 ng/L) were responsible for the earthy/musty odors in the Yellow River source waters, and dimethyl disulfide (648.2 ng/L) was responsible for the rancid/swampy odor (FPA intensity, 8.0) episode in Yinchuan. This is a comprehensive study reporting on the occurrence and possible reasons for the odor issues in the Yellow River source water during winter.

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Section: Evaluation Of Typical Odorous Compoundsmentioning

confidence: 99%

Section: Evaluation Of Typical Odorous Compoundsmentioning

confidence: 99%

Source-water odor during winter in the Yellow River area of China: Occurrence and diagnosis

Guo

et al. 2016

Environmental Pollution

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“…2. OTC has been defined as the odorant concentration corresponding to an FPA intensity of 1 (Rashash et al, 1997;Suffet et al, 2004). Table 1 shows the corresponding OTC value of each city acquired using the Weber-Fechner model.…”

Section: Weber-fechner Plots Of 2-mibmentioning

confidence: 99%

“…Flavor profile analysis (FPA), which uses a minimum of four trained panelists to identify the types and intensities of the odors present in samples (APHA et al, 2005;Rashash et al, 1997), is one of the most popular drinking water odor sensory methods. FPA data can be described using the Weber-Fechner model to relate odor intensity to the logarithm of odorant concentration.…”

Section: Introductionmentioning

confidence: 99%

Quantitative method to determine the regional drinking water odorant regulation goals based on odor sensitivity distribution: Illustrated using 2-MIB

An¹,

Cao²,

Yang³

et al. 2014

Journal of Environmental Sciences

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Taste and odor (T/O) in drinking water often cause consumer complaints and are thus regulated in many countries. However, people in different regions may exhibit different sensitivities toward T/O. This study proposed a method to determine the regional drinking water odorant regulation goals (ORGs) based on the odor sensitivity distribution of the local population. The distribution of odor sensitivity to 2-methylisoborneol (2-MIB) by the local population in Beijing, China was revealed by using a normal distribution function/model to describe the odor complaint response to a 2-MIB episode in 2005, and a 2-MIB concentration of 12.9 ng/L and FPA (flavor profile analysis) intensity of 2.5 was found to be the critical point to cause odor complaints. Thus the Beijing ORG for 2-MIB was determined to be 12.9 ng/L. Based on the assumption that the local FPA panel can represent the local population in terms of sensitivity to odor, and that the critical FPA intensity causing odor complaints was 2.5, this study tried to determine the ORGs for seven other cities of China by performing FPA tests using an FPA panel from the corresponding city. ORG values between 12.9 and 31.6 ng/L were determined, showing that a unified ORG may not be suitable for drinking water odor regulations. This study presents a novel approach for setting drinking water odor regulations.

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“…Deste modo, o desenvolvimento de técnicas alternativas para a identificação e quantificação de compostos orgânicos causadores de gosto e odor tem sido consideradas e dentre estas, pode-se citar à utilização do Painel Sensorial (Flavor Profile Analysis), largamente difundido na indústria alimentícia e de bebidas (Bartels et al, 1986;Rashash et al, 1997) …”

Section: Introductionunclassified

Técnicas de avaliação de gosto e odor em águas de abastecimento: método analítico, análise sensorial e percepção dos consumidores

Filho

Alves

2006

Eng. Sanit. Ambient.

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Os problemas de gosto e odor em águas de abastecimento são de natureza complexa, de solução tecnológica difícil e onerosa, e a sua presença na água tratada pode causar transtornos consideráveis junto aos consumidores. Deste modo, este trabalho objetivou a avaliar a eficiência e confiabilidade do Painel Sensorial na identificação de gosto e odor em águas de abastecimento, bem como na prevenção de reclamações por parte dos consumidores, a partir da comparação entre a percepção do Painel Sensorial e da população. Com base nos resultados obtidos, pôde-se concluir que o Painel Sensorial apresentou-se ser extremamente eficiente para a previsão do aparecimento e presença de odores associados à terra e mofo devido a presença de MIB e Geosmina na água tratada sendo, portanto, recomendável a sua implementação em ETAs que utilizem mananciais que apresentem problemas de gosto e odor.

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FPA of selected odorous compounds

Cited by 64 publications

References 24 publications

Source-water odor during winter in the Yellow River area of China: Occurrence and diagnosis

Source-water odor during winter in the Yellow River area of China: Occurrence and diagnosis

Quantitative method to determine the regional drinking water odorant regulation goals based on odor sensitivity distribution: Illustrated using 2-MIB

Técnicas de avaliação de gosto e odor em águas de abastecimento: método analítico, análise sensorial e percepção dos consumidores

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