GL Sciences / Tenax
GL Sciences-Tenax
The Tenax material consists of a porous polymer based on 2,6-diphenyl-p-phenylene oxide.
TenaxTA was developed to minimise ghost peaks caused by aromatic hydrocarbons and halogenated compounds. This material can be used both in a packed column and as a trapping adsorbent for organic volatile and semi-volatile compounds.
Tenax GR is made from the same polymer as Tenax TA, but 23% 0.5µm graphitic carbon has been added in the polymerisation process. The addition of graphitic carbon maintains the same hydrophobicity and thermal stability, but results in a higher breakthrough volume than conventional Tenax TA.
| Polymer | Surface area | Pore volume | Pore size | Density |
| Tenax TA | 35 m²/g | 2.4 cm²/g | 200 nm | 0.25 g/cm³ |
| Tenax GR | 25 m²/g | N/A | N/A | 0.30 g/cm³ |
Breakthrough volumes at 20°C / mL/min
| Samples | Tenax TA | Tenax GR |
| Monochloromethane | 44 | 121 |
| Dichloromethane | 275 | 890 |
| Trichloromethane（Chloroform） | 1460 | 3160 |
| Tetrachloromethane | 3210 | 6250 |
| Monochloroethane | 246 | 393 |
| 1,1-Dichloroethane | 664 | 2350 |
| 1,2-Dichloroethane | 1880 | 23700 |
| 1,1,1-Trichloroethane | 3650 | 12000 |
| 1,1,2-Trichloroethane | 21900 | 57700 |
| 1,1,2,2-tetrachloroethane | 185000 | 932000 |
| Dibromomethane | 4020 | 15300 |
| Tribromomethane（Bromoform） | 215 | 470 |
| Tetrabromomethane | 500000 | 854000 |
| Monobromoethane | 469 | 1580 |
| 1,2-Diboromoethane | 27200 | 113000 |
| 1,1,2,2-tetrabromoethane | 6881000 | 3280000 |
| Vinyl chloride | 69 | 278 |
| methane | 1 | 1 |
| Ethane | 4 | 7 |
| Propane | 26 | 46 |
| Butane | 135 | 217 |
| benzene | 8800 | 18600 |
| Toluene | 34800 | 127000 |
| water | 11 | 26 |