Techniques D’echantillonnage Pour L’analyse Des Traces Organiques

Bruchet, A.; Cognet, Louis; Mallevialle, J.

doi:10.1007/978-94-009-6345-0_4

Cited by 3 publications

(2 citation statements)

References 9 publications

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“…(7) When the sample is finished and the liquid level is down to the middle of the heater, heating is stopped and the apparatus is left for 10 min to cool down. (8) For further concentration from 10 to 1 mL (or less), the needle valve is closed and the nitrogen gas is started (about 1 mL/s). Mild heat is applied according to the sensitivity of solvent and solutes to thermal decomposition.…”

Section: Operation Of Evacsmentioning

confidence: 99%

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Evaporative concentration system for trace organic analysis

Ibrahim¹,

Suffet²,

Sakla³

1987

Anal. Chem.

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Section: Operation Of Evacsmentioning

confidence: 99%

“…The sample is transferred to a 1-mL vial with a Teflon lined cap and stored at 0 °C until analysis. (8) Cleaning of Glassware. The same cleaning procedure was used for the glassware of the K-D and EVACS.…”

Section: Operation Of Evacsmentioning

confidence: 99%

Evaporative concentration system for trace organic analysis

Ibrahim¹,

Suffet²,

Sakla³

1987

Anal. Chem.

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The Interface of Health Effects and Chemistry at Water Treatment Plants

Cognet¹,

Duguet²,

Mallevialle³

1989

Watershed 89

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Mutagenic activity of disinfection by-products.

Cognet¹,

Courtois²,

Mallevialle³

1986

Environ Health Perspect

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Data on raw water quality, disinfection treatment practices, and the resulting mutagenic properties of the treated water were compiled from pilot-and full-scale treatment experiments to evaluate that parameter which might produce variability in the results of a mutagenic study.Analysis of the data and comparison of treatment practices indicated that the measured mutagenic activity is strongly related to the characteristics of the organic matter in the raw water, the methodology used to sample and detect mutagens, the scale of the study both in terms of treatment flow and period of study, and the point at which and the conditions under which oxidants are added during treatment.Conclusions regarding disinfection systems in full-scale water treatment plants include the following: When raw water is pretreated and high concentrations of organics are present in the raw water, both ozonation and chlorination increased mutagenic activity. However, no significant difference in mutagenicity was found between the two oxidants.Both in the case of a nitrified groundwater and a clarified surface water, the mutagenic activity of the water after ozonation was related to its mutagenic activity before ozonation.With ozonation, mutagenic activity decreased after granular activated carbon (GAC) filtration. Thus, when GAC filtration follows ozone disinfection, early addition of oxidants may not be deleterious to the finished water quality. When chlorine or chlorine dioxide is added after GAC filtration, chlorine dioxide was found to produce a less mutagenic water than chlorine.Although these conclusions suggest means of controlling mutagenic activity during treatment, it must be stressed that the measurement of mutagenicity is a presumptive index of contamination level.

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Techniques D’echantillonnage Pour L’analyse Des Traces Organiques

Cited by 3 publications

References 9 publications

Evaporative concentration system for trace organic analysis

Evaporative concentration system for trace organic analysis

The Interface of Health Effects and Chemistry at Water Treatment Plants

Mutagenic activity of disinfection by-products.

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