Gas chromatography thermal desorber TT24-7xr

T24-7xr is an advanced, versatile thermal desorption (TD) instrument for low-flow monitoring of airborne very-volatile and volatile organic compounds (VVOCs and VOCs) with GC–MS. Optimised for continuous monitoring TT24-7xr incorporates twin trap technology ensuring complete sample coverage and enhanced throughput. With advanced water management and automated stream selection between sample, standard and blank TT24-7xr is ideally suited to unattended, continuous monitoring of environmental air, material testing chambers and process gas streams. The TT24-7xr achieves continuous on-line monitoring using two focusing traps The sample is first collected onto Trap A. The sample flow is then switched to Trap B, while Trap A is desorbed and the compounds analysed. This alternating sampling/desorption process is also applied to the standard/blank and is repeated until the end of the analytical sequence. Advantages of TT24-7xr Extended sample coverage – The use of two focusing traps working in tandem ensures continuous sampling with no data gaps. Wide analyte range – Trapping temperatures as low as -30ºC, backflushed trap desorption and inert, optimised flow paths allow quantitative detection of VVOCs and VOCs. Whilst single tube analysis provides detection of SVOCs up to C40 Effective water management – Kori-xr water management modules enable simultaneous sampling of C2 and polar VOCs, including aldehydes and ketones. Laboratory efficiency - Automated, unattended stream selection for easy sequencing between the samples, blank and calibration standard channels at user-defined frequencies.