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Merck
  • Analysis of volatile contaminants in vegetable oils by headspace solid-phase microextraction with carboxen-based fibres.

Analysis of volatile contaminants in vegetable oils by headspace solid-phase microextraction with carboxen-based fibres.

Journal of chromatography. A (2000-04-11)
B D Page, G Lacroix
摘要

The headspace solid-phase microextraction (HS-SPME) efficiencies from vegetable oil of the recently available Carboxen-poly(dimethylsiloxane) (PDMS) and divinylbenzene-Carboxen-PDMS fibres were found to be much greater than those of the PDMS fibre for a number of volatile contaminants. Using these Carboxen-based fibres, the commonly used HS-SPME equilibration times for aqueous matrices of 30-45 min at room temperature for a number of halogenated and aromatic analytes with volatilities ranging from 1,1-dichloroethylene to hexachlorobenzene were found to be insufficient for the effective extraction of the less volatile analytes from vegetable oil. HS-SPME at 100 degrees C for 45 min, followed by rapid cooling to 0 degrees C with a 10 min continuing extraction, however, significantly increased the SPME efficiencies for the less volatile analytes. Spiking solutions were prepared in vegetable oil instead of methanol as the latter was found to displace analytes from the Carboxen material. Using either of the Carboxen-based fibres and SPME at 100 degrees C, all the target analytes could be determined at low or sub-microg kg(-1) with repeatability < or =10%, even though an equilibrium SPME of the less volatile analytes was not achieved.

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Supelco
SPME 纤维组件二乙烯基苯/羧基/聚二甲基硅氧烷 (DVB/CAR/PDMS), needle size 24 ga, for use with manual holder
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SPME 纤维组件二乙烯基苯/羧基/聚二甲基硅氧烷 (DVB/CAR/PDMS), needle size 24 ga, StableFlex
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SPME 纤维组件二乙烯基苯/羧基/聚二甲基硅氧烷 (DVB/CAR/PDMS), needle size 23 ga, StableFlex, for use with autosampler
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SPME 纤维组件二乙烯基苯/羧基/聚二甲基硅氧烷 (DVB/CAR/PDMS), needle size 23 ga, StableFlex, for use with manual holder or autosampler, fiber L 2 cm
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SPME 纤维组件二乙烯基苯/羧基/聚二甲基硅氧烷 (DVB/CAR/PDMS), needle size 24 ga, StableFlex, for use with autosampler
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ORBO Carboxen-564 管, W,F,F separators, O.D. × L 6 mm × 75 mm, pkg of 25 ea, for analyte group MEK (methylethyl ketone)
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Carbopack®吸附剂, matrix Carboxen® 1000, 60-80 mesh, bottle of 10 g
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ORBO-78 400/200mg,每包 25 支, W,W,W separators, O.D. × L 6 mm × 110 mm, pkg of 25 ea
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Carboxen®1010 多孔层壁涂开管柱, L × I.D. 30 m × 0.53 mm, average thickness 30 μm
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SPME固相微萃取萃取头 Carboxen/聚二甲基硅氧烷 (CAR/PDMS), df 75 μm(CAR/PDMS, for use with manual holder, needle size 24 ga
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Carboxen® 1006 多孔层壁涂开管柱, L × I.D. 30 m × 0.53 mm, average thickness 30 μm
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SPME固相微萃取萃取头 Carboxen/聚二甲基硅氧烷 (CAR/PDMS), df 85 μm(CAR/PDMS, needle size 23 ga, StableFlex, for use with autosampler
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SPME固相微萃取萃取头 Carboxen/聚二甲基硅氧烷 (CAR/PDMS), df 75 μm(CAR/PDMS, needle size 24 ga, for use with autosampler
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SPME固相微萃取萃取头 Carboxen/聚二甲基硅氧烷 (CAR/PDMS), df 85 μm(CAR/PDMS, needle size 24 ga, StableFlex, for use with autosampler
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Carboxen®1010 多孔层壁涂开管柱, L × I.D. 30 m × 0.32 mm, average thickness 15 μm
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SPME固相微萃取萃取头 Carboxen/聚二甲基硅氧烷 (CAR/PDMS), df 85 μm(CAR/PDMS, needle size 24 ga, for use with manual holder, StableFlex fiber
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SPME固相微萃取萃取头 Carboxen/聚二甲基硅氧烷 (CAR/PDMS), df 75 μm(CAR/PDMS, needle size 23 ga, for use with autosampler
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SPME固相微萃取萃取头 Carboxen/聚二甲基硅氧烷 (CAR/PDMS), df 75 μm(CAR/PDMS, needle size 23 ga, for use with manual holder
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Carbopack®吸附剂, matrix Carboxen® 572, 20-45 mesh, bottle of 10 g
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Carboxen® 1006 多孔层壁涂开管柱, L × I.D. 30 m × 0.32 mm, average thickness 15 μm
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Tenax® TA/Carboxen® 1018, glass TD tube, preconditioned, O.D. × L 1/4 in. × 3 1/2 in., Sealed with (Swagelok® End-Fittings), pkg of 10 ea
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Carboxen® 1000 双向固相萃取管, 200 mg/mL, pk 30
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SPME 纤维组件二乙烯基苯/羧基/聚二甲基硅氧烷 (DVB/CAR/PDMS), for use with autosampler, needle size 23 ga, metal alloy fiber, fiber L 2 cm
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Carbopack®吸附剂, matrix Carboxen® 1000, 40-60 mesh, bottle of 50 g
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Carbopack®吸附剂, matrix Carboxen® 569, 20-45 mesh, bottle of 10 g
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Carbopack®吸附剂, matrix Carboxen® 1003, 40-60 mesh, bottle of 10 g
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ORBO-93吸附管, ORBO tube I.D. × L 6 mm × 95 mm, Bed A 180 mg, Bed B 90 mg, 60/80 mesh, pkg of 25 ea
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Graphsphere Adsorbent, matrix Graphsphere 2016, 60-80 mesh, bottle of 10 g
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Carbopack®吸附剂, matrix Carboxen® 569, 20-45 mesh, bottle of 500 g