Chemical transformations of alcohols sampled with the use of adsorptive enrichment on the carbon adsorbent traps followed by thermal desorption.

Chemical transformations of alcohols sampled with the use of adsorptive enrichment on the carbon adsorbent traps followed by thermal desorption.

The Analyst (2005-04-27)

Wojciech Kornacki, Patrycja Fastyn, Janusz Gawlowski, Tomasz Gierczak, Jan Niedzielski

ABSTRACT

Graphitized carbons, Carbopack X, Carbograph 5TD and Carbotrap B, used to enrich samples of C(3)-C(4) alcohols determined in the atmospheric air produce experimental artefacts. After thermal desorption, recoveries for alcohols are much smaller than unity with a concomitant appearance of aldehydes and ketones on chromatograms. Obviously, the adsorbents studied cannot be recommended for analysis of alcohols, ketones and aldehydes in the atmosphere. Polymeric adsorbents, Tenax TA and Chromosorb 106, do not exhibit such oxidative properties.

MATERIALS

Product Number

Brand

Product Description

29535-U

Supelco

Carbopack^™ B, glass TD tube, fritted, O.D. × L 1/4 in. × 3 1/2 in., preconditioned, pkg of 10 ea

28311-U

Supelco

Carbotrap^® 349, glass TD tube, fritted, O.D. × I.D. × L 6 mm × 4 mm × 7 in., preconditioned, pkg of 1 ea

28273-U

Supelco

Carbotrap^® 300, stainless steel TD tube, O.D. × I.D. × L 6 mm × 4 mm × 7 in., preconditioned, pkg of 1 ea

28283-U

Supelco

Carbotrap^® 300, glass TD tube, fritted, O.D. × I.D. × L 6 mm × 4 mm × 7 in., preconditioned, pkg of 1 ea

10437-U

Supelco

Carbopack^™ Adsorbent, matrix Carbopack^™ X, 60-80 mesh, bottle of 10 g

20370-U

Supelco

Carbotrap^® 300, stainless steel TD tube, O.D. × I.D. × L 1/4 in. × 5 mm × 7 in., preconditioned, pkg of 1 ea

10435-U

Supelco

Carbotrap^® Adsorbent, matrix Carbotrap^® X, 20-40 mesh, bottle of 10 g

10436

Supelco

Carbopack^™ Adsorbent, matrix Carbopack^™ X, 40-60 mesh, bottle of 10 g

10257

Supelco

Carbopack^™ Adsorbent, matrix Carbopack^™ C, 60-80 mesh, bottle of 10 g

10258

Supelco

Carbopack^™ Adsorbent, matrix Carbopack^™ C, 80-100 mesh, bottle of 10 g

30136-U

Supelco

Carbopack^™ B, glass TD tube, fritted, O.D. × L 1/4 in. × 3 1/2 in., unconditioned, pkg of 10 ea, matrix Carbopack^™

20309

Supelco

Carbotrap^® Adsorbent, matrix Carbotrap^® C, 20-40 mesh, bottle of 10 g

20287

Supelco

Carbotrap^® Adsorbent, matrix Carbotrap^® B, 20-40 mesh, bottle of 10 g

29532-U

Supelco

Carbotrap^® 300, glass TD tube, fritted, O.D. × L 1/4 in. × 3 1/2 in., preconditioned, pkg of 10 ea

21705-U

Supelco

Carbotrap^® 300, O.D. × L 1/4 in. × 3 1/2 in., stainless steel TD tube, preconditioned, pkg of 10 ea

30135-U

Supelco

Carbopack^™ B, stainless steel TD tube, O.D. × L 1/4 × 3 1/2, unconditioned, pkg of 10 ea

30139-U

Supelco

Carbotrap^® 300, stainless steel TD tube, unconditioned, pkg of 10 ea

11047-U

Supelco

Carbotrap^® Adsorbent, matrix Carbotrap^® C, 20-40 mesh, bottle of 500 g

29746-U

Supelco

Carbotrap^® 300, O.D. × L 1/4 in. × 3 1/2 in., stainless steel TD tube, Sealed with Brass Endcaps, preconditioned, pkg of 10 ea

29754-U

Supelco

Carbopack^™ B, O.D. × L 1/4 in. × 3 1/2 in., glass TD tube, fritted, Sealed with Brass Endcaps, preconditioned, pkg of 10 ea

29752-U

Supelco

Carbotrap^® 349, O.D. × L 1/4 in. × 3 1/2 in., glass TD tube, fritted, Sealed with Brass Endcaps, preconditioned, pkg of 10 ea

29751-U

Supelco

Carbotrap^® 300, O.D. × L 1/4 in. × 3 1/2 in., glass TD tube, fritted, Sealed with Brass Endcaps, preconditioned, pkg of 10 ea

28686-U

Supelco

FLM Carbopack^™ X Deactivated Stainless Steel TD Tube, preconditioned, pkg of 10 tubes, O.D. × L 1/4 in. (6.35 mm) × 3 1/2 in. (89 mm)

28313-U

Supelco

Carbotrap^® 202, glass TD tube, fritted, O.D. × I.D. × L 6 mm × 4 mm × 7 in., preconditioned, pkg of 1 ea

29537-U

Supelco

Carbopack^™ X, glass TD tube, fritted, O.D. × L 1/4 in. × 3 1/2 in., preconditioned, pkg of 10 ea

20273

Supelco

Carbopack^™ Adsorbent, matrix Carbopack^™ B, 60-80 mesh, bottle of 10 g

20255-U

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

20254-U

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

20083-U

Supelco

Carbotrap^® 202, stainless steel TD tube, O.D. × L 1/4 in. × 3 1/2 in., preconditioned, pkg of 10 ea

20013-U

Supelco

Carbotrap^® 217, stainless steel TD tube, O.D. × L 1/4 in. × 3 1/2 in., preconditioned, pkg of 10 ea