Evaluation of a new dualsorbent trap for organic pollutants of different volatility

Method to predict gas chromatographic response factors for the trace‐level analysis of volatile organic compounds based on the effective carbon number concept

“…In Fig. , experimental RF values (Table ) are plotted against BTV data obtained on a Carbograph 5 and Carbograph 2 (graphitized carbon black) sorbent bed ; these sorbents are similar to Carbopack B in the CT. Figure A shows all available data covering the entire data range, whereas Fig.…”

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

“…The concentration of benzene was twice the maximum allowable level, indicating the necessity of a more strict control of air concentration [50]. Because the BTV for benzene was about 66000 liters per trap [13], the dualsorbent tube can be used both for spot sampling and trapping of several liters of air.…”

“…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.…”

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

“…For these experiments we chose graphitized carbons: Carbotrap B, Carbopack X and Carbograph 5TD, and polymeric adsorbents, Tenax TA and Chromosorb 106. Carbopack X and Carbograph 5TD are currently very popular for the collection of ambient VOCs, [13][14][15][16][17][18][19][20] Carbotrap B and Tenax belong to adsorbents most widely used, [2][3][4][5][6][7] Chromosorb 106 was recommended for sampling more volatile and polar organic vapours as a result of European interlaboratory tests. 21 Experiments were carried out under the conditions closely simulating the real field measurements.…”