A sorbent device to detect an amount of volatile organic compounds in a sample of air, the sorbent device comprising: a body comprising a sampling inlet, a sampling outlet and a cavity between the inlet and the outlet; the cavity comprising a serial arrangement of four different sorbent materials each effective to adsorb and desorb one or more of the volatile organic compounds in the sample of air, in which the sorbent materials are arranged from a material with a weakest sorbent strength to a material with a strongest sorbent strength, according to their relative ability to adsorb the volatile organic compounds, with the material of weakest sorbent strength being effective to adsorb and desorb high boiling point volatile organic compounds and the material with a strongest sorbent strength effective to adsorb and desorb light weight volatile organic compounds and gases that breakthrough the weaker sorbent strength material, with the weakest sorbent strength material adjacent to the sampling inlet, the sorbent device further comprising a fluid permeable barrier between each of the four different sorbent materials; wherein three of the four different sorbent materials is a graphitized carbon black with each of the three graphitized carbon black sorbent materials having a different chemical composition; wherein one of the four different sorbent materials is a carbon molecular sieve; wherein the four different sorbent materials are effective to desorb substantially all of the volatile organic compounds adsorbed to the four different sorbent materials in a single desorption cycle and wherein the sorbent device can be reused without any temperature treatment steps after the single desorption cycle. a body comprising a sampling inlet, a sampling outlet and a cavity between the inlet and the outlet; the cavity comprising a serial arrangement of four different sorbent materials each effective to adsorb and desorb one or more of the volatile organic compounds in the sample of air, in which the sorbent materials are arranged from a material with a weakest sorbent strength to a material with a strongest sorbent strength, according to their relative ability to adsorb the volatile organic compounds, with the material of weakest sorbent strength being effective to adsorb and desorb high boiling point volatile organic compounds and the material with a strongest sorbent strength effective to adsorb and desorb light weight volatile organic compounds and gases that breakthrough the weaker sorbent strength material, with the weakest sorbent strength material adjacent to the sampling inlet, the sorbent device further comprising a fluid permeable barrier between each of the four different sorbent materials; wherein three of the four different sorbent materials is a graphitized carbon black with each of the three graphitized carbon black sorbent materials having a different chemical composition; wherein one of the four different sorbent materials is a carbon molecular sieve; wherein the four different sorbent materials are effective to desorb substantially all of the volatile organic compounds adsorbed to the four different sorbent materials in a single desorption cycle and wherein the sorbent device can be reused without any temperature treatment steps after the single desorption cycle. <EOS>