Evaluation of a dual-sorbent trap for monitoring organic compounds in air

Sampling and analysis of volatile organic compounds in air using a dualsorbent trap

“…An internal standard was not employed. Desorption recoveries were known to be complete [12,13] at the desorption temperature used for the dualsorbent trap. Calibration curves were constructed by spiking the traps with increasing amounts (5-10-50-100-500ng) of the selected compounds and repeating the analysis three times for each amount.…”

“…ix L 1 in carbon disulfide. The spiked traps were completely eluted with 1 mL of carbon disulfide and 1 ixL of eluate was injected into the gas chromatograph and used as standard solution for calculations [12].…”

Proton Transfer Reaction Mass Spectrometry: Applications in the Life Sciences

“…Regarding breakthrough volumes, studies using a combination of Carbotrap, Carbopack X and Carboxen-569 showed breakthrough volumes lower than 5% for a wide range of VOCs, including benzene, toluene, xylene and alpha-pinene; for acetone, breakthrough volumes were found to be dependent on the volume sampled ( [197]; [199]). Experiments using a mixture of Carbograph 2 and Carbograph 5 also showed low breakthrough volumes (<1%) for a number of VOCs, including o-xylene [201]. Ross and Vermeulen [198] observed good correlation between the amount of toluene and xylene applied to tubes containing Carbograph 1TD (one of the adsorbents in our multi-sorbent bed) and the amount measured after thermally desorbing the tubes.…”

Proton‐transfer reaction mass spectrometry (PTRMS) in combination with thermal desorption (TD) for sensitive off‐line analysis of volatiles

“…[24,26] Experiments using a mixture of Carbograph 2 and Carbograph 5 also showed low breakthrough volumes (<1%) for a number of VOCs, including o-xylene. [30] Ross and Vermeulen [25] observed good correlation between the amount of toluene and xylene applied to tubes containing Carbograph 1TD (one of the adsorbents in our multi-sorbent bed) and the amount measured after thermally desorbing the tubes.…”

“…For breakthrough volumes, studies using a combination of Carbotrap, Carbopack X and Carboxen‐569 showed breakthrough volumes lower than 5% for a wide range of VOCs, including benzene, toluene, xylene and alpha‐pinene; for acetone, breakthrough volumes were found to be dependent on the volume sampled . Experiments using a mixture of Carbograph 2 and Carbograph 5 also showed low breakthrough volumes (<1%) for a number of VOCs, including o ‐xylene . Ross and Vermeulen observed good correlation between the amount of toluene and xylene applied to tubes containing Carbograph 1TD (one of the adsorbents in our multi‐sorbent bed) and the amount measured after thermally desorbing the tubes.…”