Markes TD100-xr全自动热脱附系统

• 吸附管数量：100

• 解析率：＞90%

• 冷阱温度：-30℃

• 控温范围：35～425 ℃（-30~400℃）

• 仪器种类：二次热解析仪、热解吸仪

2.1  Control software

• Markes Instrument Control (MIC) allows:

 – Automated, unattended sequencing of tube and on-line samples.

 – Editing of active sequences.

 – Rapid set-up of TD methods using pre-programmed parameters for standard methods including VDA 278, US EPA TO-17 

and PAH analysis.

 – Pre-loading of an internal standard on a tube or trap.

 – System self-checking.

2.2  Desorption modes

• Tube conditioning mode: Desorption of the sample tube for cleaning purposes, with all the 

effluent directed to vent, i.e. away from the cold trap and other important components of the 

sample flow path.

• Two- or three- stage desorption mode: Normal two-stage desorption of a sample with the 

option of an elevated-temperature purge.

• Trap conditioning mode: Desorption of cold trap for cleaning purposes, or for obtaining a system 

blank.

2.3  Primary (tube) desorption oven主（管）解吸附炉

• Temperature温度

 – Range温度范围: 35°C to 425°C.

 – 可设定为1℃递增，Settable in 1°C increments.

N.B. The tube oven heats from ambient to the selected temperature at the start of tube desorption in order to minimise risk of flash 

vaporisation and split discrimination when analysing samples with unknown water/solvent content.

• Desorption time 解吸附时间

 – 时间范围Range: 0–600 min.

 – 可设定为0.1分钟递增Settable in 0.1 min increments.

2.4  Focusing (‘cold’) trap 聚焦（冷）阱

• Quartz cold trap石英冷阱: 2 mm i.d. where packed and 0.9 mm i.d. at the sample input/output end. 

Collar at non-sampling end makes trap easy to change.

• Central 60 mm packed with between one and four sorbents.

• Backflush desorption ensures quantitative retention and release of wide boiling range samples.

• Trap low temperature 冷阱温度

 – Range温度范围: –30°C to 50°C.

 – 可设定为1℃递增Settable in 1°C increments.

 – Uniform electrical cooling applied over full 60 mm length of sorbent bed.在全长60米的脱附床上均匀电子冷却

• Trap high temperature 阱高温

 – Range温度范围: 35°C to 425°C.

 – 可设定为1℃递增Settable in 1°C increments.

 – Uniform heating applied over full 60 mm length of sorbent bed.在全长60米的脱附床上均匀加热

• Hold time at trap high temperature 在阱高温的保持时间

 – 时间范围Range: 0–60 min.

 – 可设定为0.1分钟递增Settable in 0.1 min increments.

2.5  Sample flow path  流路样品

• Temperature range:温度范围

 – 阀Valve: 50°C to 210°C.

 – 传输线Transfer line: 50°C to 250°C.

 – Both settable in 1°C increments.

 – Uniform heating.

• Constructed entirely of inert materials: PTFE, quartz, inert-coated stainless steel and uncoated, deactivated fused silica.

2.6  Pneumatics 辅助

• 要求压力控制的0-60 psi的氦气或氮气载气，Requires a pressure-controlled 0–60 psig (0–415 kPa) supply of helium or nitrogen carrier gas under manual or electronic control.

• 电子质量流量控制（选项）可设定为2-500 mL/分钟（氦气），和2–250 mL/min（氮气）  Electronic mass flow control (option) is settable between 2–500 mL/min (helium), and 2–250 mL/min (nitrogen).

• Requires a pressurised supply of dry air or nitrogen (dewpoint below –50°C) at 50–60 psig (340–415 kPa).

N.B. Helium cannot be used as the dry gas supply.

• Carrier gas and dry air or nitrogen pressure control is regulated by the included pneumatic control accessory (U-GAS01).

2.7  Pre-desorption checks and controls

• Leak test: Each tube is pressurised and subjected to a stringent, ambient temperature leak test without carrier gas flow. Failed tubes are not desorbed, but preserved intact for operator attention.

• Pre-purge: Each tube is purged with carrier gas (in the desorption direction) at ambient temperature, to remove oxygen before 

desorption. The air is purged to vent and none of it is allowed to reach the analyser e.g. GC–MS.

• Pre-purge time:

 – Range: 0–60 min.

 – Settable in 0.1 min increments.

• An additional carrier gas pre-purge can be carried out at elevated temperature to remove water or other interfering solvent if required.

• The cold trap can be selected to be in or out of line during either of the pre-purge stages.

• The split can be selected to be open or closed during either of the pre-purge stages.

2.8  Sample splitting and quantitative 

re-collection for repeat analysis

• The TD100-xr split can be operated in the following ways:

 – During primary (tube) desorption only.

 – During secondary (trap) desorption only.

 – During both desorption stages, i.e. double splitter operation.

 – During neither desorption stage, i.e. splitless operation.

• The split can be turned on or off during system standby and at any stage during pre- or dry purge.

• Split and desorb flows are controlled by needle and solenoid valves downstream of the sample flow path. Alternatively, the flows can be controlled electronically using mass flow controller accessories (2–500 mL/min (helium) and 2–250 mL/min (nitrogen)), which allow split ratios from zero to 125,000 : 1 to be used with standard (60 m × 0.25 mm) capillary columns. 

• The split vent line contains a charcoal filter in front of the control valves (and MFC) to prevent contamination of the valves/MFC and laboratory atmosphere. The charcoal filter has the same external dimensions as a standard sorbent tube. 

The charcoal filter is connected to the main heated valve via a short, inert, heated flow path. 

• When required, the charcoal filter can be replaced with a conditioned sorbent tube to quantitatively re-collect the split effluent from tube and trap desorption (inlet and outlet split). This capability allows repeat analysis, method/data validation and archiving of critical samples.

2.9  Automatic sequencing

• A tube sequence can be entered into the sequence table via the PC user interface.

• An entire sequence can be ‘recycled’ any number of times.

• Individual tubes can be identified as ‘calibrant’, ‘blank’ or ‘sample’.

• A log file is produced as a sequence progresses, and is automatically maintained and saved. 

• Sequence deviations, e.g. leak test failure or missing tube, are recorded in the log file. If any occur, the GC run is initiated to keep the analytical system synchronised with the desorber.