Brief introduction of the instrument:
Practical and moral research Methods autotds was recommended -VPro automatic thermal desorption instrument is a 24 bit low temperature secondary automatic thermal desorption instrument with shunt function, which can store multiple operation methods. The electric six-way valve and solenoid valve are combined in the gas path, which can automatically complete the five processes of dry blowing (removing oxygen and water gas in the sampling tube), primary desorption low-temperature enrichment (selective split), secondary desorption, sample injection and back blowing. The primary desorption temperature, secondary desorption temperature, cold trap temperature and pipeline heating temperature can be set independently At the same time, the chromatograph and workstation can be started at the same time.
Working conditions ：
Power supply: 220 ± 22vac, 50 ± 0.5Hz (ensure reliable grounding of power line and grounding of shell)
Back blowing carrier gas pressure: ≤ 0.4MPa
Ambient temperature: + 5 ℃～ 35 ℃
Relative humidity: ≤ 85%
Power: < 900va
Grade: 24 position sample
Temperature control range:
One time desorption: room temperature ~ 400 ℃, control accuracy ± 1 ℃
The second desorption rate was more than 3000 ℃ at room temperature
L. pipeline: room temperature ~ 220 ℃, control accuracy ± 1 ℃
L. cold trap: minimum - 35 ℃ (room temperature: 20 ℃)
Single desorption shunt and no shunt are optional
Timing range: 59 seconds to 59 minutes
Timing error: < 0.1%
Pressure circuit: > 4MPa
Flow regulation range: 0-300ml / min
Synchronous signal output: two-way 1-2 second switching value
External dimension of the instrument: 460mm * 370mm * 700mm, h * w * L
The weight of the instrument is about 35kg
Strong general performance: it can be combined with any brand gas chromatograph (GC) and (GC-MS) to realize the interconnection of control information.
Simple operation, easy to use, software control, high degree of automation: just put the sample tube into the thermal desorption instrument, all operations and control are completed by the control software, so the sample repeatability is good; the design of large touch LCD screen in the host can track the temperature and operation command in the whole process.
The system can store up to 10 running methods.
Synchronous interface is provided to start chromatography and workstation at the same time of injection.
Electronic flow display, purge flow and back flow
At room temperature + 20 ℃, the lowest refrigeration temperature can be achieved by using semiconductor trap at room temperature + 20 ℃.
The trap is heated by direct resistance, and the heating rate is more than 3000 ℃ / min.
All pipelines and six way valves can be heated at controlled temperature to eliminate the cold point of the system and reduce sample loss.
Split / no split, one-time desorption can be switched between split and no split, the split ratio is manually adjusted.
With sample tube automatic leak detection and fault alarm function: before testing each sample, it can automatically check whether the sample tube and system gas path are installed properly.
The sample pipeline is treated with silylation inert treatment of stainless steel pipe to reduce pollution residue.
It is directly connected to the GC carrier gas path without occupying the injection port.
No pneumatic components, no need to drive air source.