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Evaluation of solid adsorbent materials for cryogen-free trapping-gas chromatographic analysis of atmospheric C2-C6 non-methane hydrocarbons.

Journal of chromatography. A (2006-10-03)
Jan Pollmann, Detlev Helmig, Jacques Hueber, David Tanner, Pieter P Tans
ABSTRACT

Nine commercial solid adsorbent materials (in order of decreasing surface area: Carboxen 1000, Carbosieve S III, molecular sieve 5A, molecular sieve 4A, silica gel, Carboxen 563, activated alumina, Carbotrap and Carboxen 1016) were investigated for their ability to trap and release C2-C6 non-methane hydrocarbons (NMHCs) in atmospheric samples for subsequent thermal desorption gas chromatography-flame ionization detection analysis (GC-FID). Recovery rates for 23 NMHCs and methyl chloride (CH3Cl) were determined. A microtrap filled with the three adsorbents Carbosieve S III, Carboxen 563 and Carboxen 1016 was found to allow for the analysis of the widest range of target analytes. A detection limit of approximately 3pptC [parts per trillion (carbon)] in a 1l air sample and a linear response over a wide range of volatilities and sample volumes was determined for this configuration. Water vapor in the sample air was found to causes interference in trapping and subsequent chromatographic analysis of light NMHCs. A Peltier-cooled, regenerable water trap inserted into the sample flow path was found to mitigate these problems and to allow quantitative and reproducible results for all analytes at all tested humidity conditions.

MATERIALS
Product Number
Brand
Product Description

Supelco
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
Supelco
Carboxen®-1010 PLOT Capillary GC Column, L × I.D. 30 m × 0.53 mm, average thickness 30 μm
Supelco
Carboxen® Adsorbent, matrix Carboxen® 569, 20-45 mesh, bottle of 10 g
Supelco
ORBO 78 HBr on Carboxen® 564 specially cleaned (20/45), 400/200 mg, W,W,W separators, O.D. × L 6 mm × 110 mm, pkg of 25 ea
Supelco
Carboxen®-1006 PLOT Capillary GC Column, L × I.D. 30 m × 0.53 mm, average thickness 30 μm
Supelco
Carbosieve® Adsorbent, matrix Carbosieve® S-III, 60-80 mesh, bottle of 10 g
Supelco
Carboxen® Adsorbent, matrix Carboxen® 1000, 60-80 mesh, bottle of 10 g
Supelco
ORBO 90 Carboxen® 564 (20/45), 160/80 mg, W,F,F separators, O.D. × L 6 mm × 75 mm, pkg of 25 ea, for analyte group MEK (methylethyl ketone)
Supelco
Carboxen®-1010 PLOT Capillary GC Column, L × I.D. 30 m × 0.32 mm, average thickness 15 μm
Supelco
Carbosieve® Adsorbent, matrix Carbosieve® S-II, 60-80 mesh, bottle of 10 g
Supelco
ORBO 101 Carbotrap® B (20/40), 100/50 mg, W,W,W separators, O.D. × L 6 mm × 70 mm, pkg of 25 ea
Supelco
Carboxen® Adsorbent, matrix Carboxen® 569, 20-45 mesh, bottle of 500 g
Supelco
Carbotrap® Adsorbent, matrix Carbotrap® B, 20-40 mesh, bottle of 10 g
Supelco
Carboxen®-1006 PLOT Capillary GC Column, L × I.D. 30 m × 0.32 mm, average thickness 15 μm
Supelco
Carbosieve® Adsorbent, matrix Carbosieve® G, 45-60 mesh, bottle of 5 g
Supelco
Carboxen® Adsorbent, matrix Carboxen® 1003, 40-60 mesh, bottle of 10 g
Supelco
Carbotrap® Adsorbent, matrix Carbotrap® C, 20-40 mesh, bottle of 10 g
Supelco
Carboxen® Adsorbent, matrix Carboxen® 1000, 40-60 mesh, bottle of 50 g
Supelco
Carbosieve® Adsorbent, matrix Carbosieve® S-II, 80-100 mesh, bottle of 10 g
Supelco
Carbotrap® Adsorbent, matrix Carbotrap® Y, 20-40 mesh, bottle of 10 g
Supelco
Carbotrap® Adsorbent, matrix Carbotrap® C, 20-40 mesh, bottle of 500 g
Supelco
Carbotrap® 200 Dynatherm 890, 850, for use with Dynatherm ACEM-9300, ACEM-900 850/890 TDU, MTDU and OI Analytical Air Tube Desorber or DMP-16
Supelco
ORBO 100 on Carbotrap® B (20/40), 350/175 mg, W,W,W separators, O.D. × L 7 mm × 110 mm, pkg of 25 ea
Supelco
Carbotrap® 317, glass TD tube (fast-flow), preconditioned, pkg of 1 ea
Supelco
Carbotrap® 100, glass TD tube, preconditioned, pkg of 10 ea
Supelco
Carbotrap® Adsorbent, matrix Carbotrap® X, 20-40 mesh, bottle of 10 g
Supelco
Carbosieve® Adsorbent, matrix Carbosieve® G, 60-80 mesh, bottle of 5 g
Supelco
Carbosieve® Adsorbent, matrix Carbosieve® G, 80-100 mesh, bottle of 5 g
Supelco
Carboxen® Adsorbent, matrix Carboxen® 563, 20-45 mesh, bottle of 10 g
Supelco
Carboxen® Adsorbent, matrix Carboxen® 564, 20-45 mesh, bottle of 10 g