CN

Determination of monoaromatic hydrocarbons (BTEX) in surface waters from a Brazilian subtropical hydrographic basin.

Determination of monoaromatic hydrocarbons (BTEX) in surface waters from a Brazilian subtropical hydrographic basin.

Bulletin of environmental contamination and toxicology (2014-02-18)

Andreia Neves Fernandes, Cindy Duarte Gouveia, Marco Tadeu Grassi, Janaina da Silva Crespo, Marcelo Giovanela

摘要

This study examined surface water samples for the presence of the monoaromatic hydrocarbons benzene, toluene, ethylbenzene and xylene. Water samples were collected from the sub-basin of the Tegas River and the Marrecas Stream microbasin located in the metropolitan region of the municipality of Caxias do Sul (Rio Grande do Sul State, Brazil). For all sampling points evaluated, only toluene was detected, with concentrations values in the range of 1.70-18.44 μg L(-1). In general, the relatively high toluene concentration for the samples collected were above the limit of 2 μg L(-1) established by the Brazilian government for Class I rivers for the protection of aquatic life. However, they were well below the established limit of 170 μg L(-1) in water used for human consumption.

材料

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Sigma-Aldrich

甲苯, anhydrous, 99.8%

Sigma-Aldrich

甲苯, ACS reagent, ≥99.5%

Sigma-Aldrich

甲苯, suitable for HPLC, 99.9%

Sigma-Aldrich

甲苯, HPLC Plus, for HPLC, GC, and residue analysis, ≥99.9%

Sigma-Aldrich

苯, anhydrous, 99.8%

Sigma-Aldrich

苯, ≥99.0%, ACS reagent

Sigma-Aldrich

苯, suitable for HPLC, ≥99.9%

Supelco

苯, analytical standard

Supelco

苯, Pharmaceutical Secondary Standard; Certified Reference Material

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苯, puriss. p.a., reag. Ph. Eur., ≥99.7%

Supelco

甲苯, analytical standard

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乙苯, anhydrous, 99.8%

Supelco

甲苯, Pharmaceutical Secondary Standard; Certified Reference Material

Supelco

乙苯, analytical standard

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苯溶液, certified reference material, TraceCERT^®, 200 μg/mL in methanol

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甲苯, Laboratory Reagent, ≥99.3%

Sigma-Aldrich

乙苯, ReagentPlus^®, 99%

Supelco

残留溶剂-甲苯, Pharmaceutical Secondary Standard; Certified Reference Material

Supelco

乙苯, Pharmaceutical Secondary Standard; Certified Reference Material

Supelco

甲苯溶液, certified reference material, 5000 μg/mL in methanol

Supelco

甲苯溶液, certified reference material, TraceCERT^®, 200 μg/mL in methanol, ampule of 1 mL

Supelco

乙苯溶液溶液, NMR reference standard, 0.1% in chloroform-d (99.8 atom % D), TMS 0.01 %, NMR tube size 5 mm × 8 in.

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甲苯, JIS special grade, ≥99.5%

Sigma-Aldrich

乙苯溶液溶液, NMR reference standard, 10% in chloroform-d (99.8 atom % D)

Supelco

乙苯溶液溶液, certified reference material, 5000 μg/mL in methanol

Sigma-Aldrich

乙苯溶液溶液, NMR reference standard, 1% in chloroform-d (99.8 atom % D)

Sigma-Aldrich

乙苯溶液溶液, NMR reference standard, 0.1% in chloroform-d (99.8 atom % D), TMS 0.01 %, NMR tube size 5 mm × 8 in. , ultra-thin wall

Supelco

乙苯溶液溶液, NMR reference standard, 10% in chloroform-d (99.8 atom % D), NMR tube size 5 mm × 8 in. , ultra-thin wall

Sigma-Aldrich

乙苯溶液溶液, NMR reference standard, 0.1% in chloroform-d (99.8 atom % D), TMS 0.01 %, NMR tube size 10 mm × 8 in.

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乙苯溶液溶液, NMR reference standard, 0.1% in chloroform-d ("100%", 99.96 atom % D)