Performance and characteristics of headspace sampler

The headspace sampler is designed for volatile compounds in liquid and solid sample systems. It achieves gas-liquid or gas-solid equilibrium at a certain temperature in a closed sample bottle, and takes the top gas sample from the bottle and introduces it into the chromatograph for analysis and detection, which is called headspace sampler. This headspace sampler for pre-processing liquid samples, solid samples, viscous samples, etc. can greatly reduce the tedious and time-consuming manual pre-processing process for samples. So, it is widely used in residual solvent detection, petrochemicals, fine chemicals, food brewing, food packaging materials, environmental testing (river water, lake water), sewage, forensic identification, detection of volatile organic compounds in samples such as drinking water, cosmetics, coatings, and paints.
Instrument Introduction:

The AHS-20A Plus fully automatic headspace sampler is a newly launched low-cost, high-performance, and widely used sample pretreatment equipment for gas chromatography by Beijing Beifen Sanspectral Instrument Co., Ltd. It can quickly and accurately extract volatile compounds from any matrix and transfer them completely to the gas chromatograph. The instrument adopts a 7.0-inch graphic dot matrix LCD display screen, with a friendly interface, clear and concise; The animation display and settings based on the principle of injection can be easily mastered without much effort, making it convenient for users to operate quickly.
Main technical parameters:
Sample heating range: 40 ℃ -220 ℃, temperature control accuracy of 1 ℃
(Can be configured up to 300 ℃ according to customer requirements)
Heating range of injection valve: 40 ℃ -220 ℃, temperature control accuracy of 1 ℃
(Can be configured up to 300 ℃ according to customer requirements)
Heating range of sample transfer tube: 40 ℃ -220 ℃, temperature control accuracy of 1 ℃
(Can be configured up to 300 ℃ according to customer requirements)
Temperature accuracy: 0.5%
Temperature stability:<± 0.5 ℃
Pressure application time: 0-9999 seconds
Sampling time: 0-30 minutes
Injection time: 0-9999 seconds
Cleaning time: 0-30 minutes
*Time interval setting: 1mS (0.001S)
● Pressurization pressure: 0~0.25Mpa (continuously adjustable)
Quantitative tube volume: 1ml (other specifications can be customized, such as 0.5ml, 2ml, 5ml, etc.)
Headspace bottle specifications: 10ml or 20ml (other specifications can be customized, such as 50ml, 100ml, etc.)
Sample workstation: 20 people
● Can heat samples simultaneously: 1 position
RSD:<1.0% (100ppm ethanol aqueous solution)
● Backblowing cleaning flow rate: 0-100ml/min (continuously adjustable)
● Synchronously start the chromatographic data processing workstation, GC or external event to synchronously start this device
● Computer USB communication interface, all parameters can be set by the computer or panel, convenient and fast

Instrument features:
*▲ Full Chinese 7-inch LCD display, easy to operate, one click start. The functions of automatic heating balance, pressurization, sampling, injection, analysis, and blowing after analysis, as well as the replacement of sample bottles, achieve full automation of the process.
▲ Can preset 20 samples, greatly improving time utilization. No manual intervention is required, improving the reliability and consistency of analysis work.
▲ It has complete parameter settings, real-time working status, running time, year month day, etc.
*▲ Comprehensive power on self-test function, automatic positioning of sample tray, automatic alarm for component faults, wiring faults, etc.
*▲ Multiple injection modes: single bottle multiple times, single bottle single time, multiple bottles single time.
*There are multiple fault diagnosis and handling modes, which can automatically determine the position of the sample bottle and avoid unfilled positions. In the event of a positional malfunction, it can prevent bottle collision. When mechanical motion is abnormal, it can automatically stop and prompt, effectively ensuring the reliability of high-precision motion and avoiding damage.
All sample transfer pipelines and quantitative rings use imported high inertia deactivation pipelines, with no residue or cross contamination, ensuring the repeatability and accuracy of sample injection.
*The combination of a six way valve and a quantitative loop greatly reduces dead volume and ensures injection accuracy.
The connection point between the six way valve and the transmission pipeline is located inside the heating insulation box, without any transmission cold points, ensuring the integrity of the sample.
▲ Adopting the classic positive pressure sampling method, it can measure liquid or solid samples with high detection sensitivity. Inject at normal pressure without baseline drift.
*All actions are driven by a motor, without the need for external driving gas, making it safe and convenient to use.
▲ Strong compatibility, can be connected to various gas chromatographs at home and abroad, can synchronously start chromatography and workstations, and work together with chromatography.
▲ Six way valves with different working temperatures and imported inert injection needles can be selected according to customer needs.
Adopting EPC electronic flow control to improve instrument reliability (optional).