HS-9AHeadspace sampling device
Overview of Headspace Sampling Device
This sampler belongs to a multi-mode headspace sampling device and is a new type of gas chromatograph sample pretreatment equipment with multiple innovations and intellectual property rights.
In the daily analysis process of gas chromatography, the maximum error of 10% comes from the instrument being operated, while 90% comes from the quality of sample pretreatment. The advantages and disadvantages of different sample pretreatment techniques and methods vary greatly. Among them, if headspace injection (gas phase extraction) gas chromatography analysis is used, it can achieve accurate, simple, and rapid analysis of volatile compounds in almost any sample. Because headspace sampling makes it extremely easy to achieve solvent-free extraction of liquid and solid samples, it can be said to fundamentally eliminate errors and problems that may occur in sample pretreatment methods such as adsorption desorption and solvent extraction.
Advantages of headspace sampling device：
Accurate, simple, fast, convenient, automatic, and environmentally friendly;
High sensitivity analysis of volatile components in samples;
Due to the fact that high boiling point components are not introduced into GC, analysis time can be shortened and work efficiency can be doubled;
The design of the sample constant temperature furnace station with circular distribution minimizes the temperature gradient at different heating positions and improves the stability of the analysis results;
The sampling pump and injection valve are combined for negative pressure sampling, without the dilution effect of external added gas, with high sensitivity and precise quantification;
The injection valve, quantitative loop, and sample transfer pipeline can control the temperature to avoid sample condensation during transmission;
The sampling pipeline and injection valve are equipped with blowback function to prevent cross contamination;
Single chip microcomputer control, LCD display temperature parameters, and thin film keyboard input;
L Over temperature and power-off protection, safe to use;
The injection needle can be freely replaced, making it convenient to connect various models of gas chromatographs at home and abroad;
Synchronize the communication interface of the chromatographic data processing workstation to improve the reproducibility of retention time;
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Application scope of headspace sampler:
Petrochemical industry: high polymer monomer coatings, volatile organic compounds, etc;
L Flavor essence: flavor analysis in beer and tea;
Forensic Science: Testing of volatile toxins such as alcohols, aldehydes, and ketones in blood and urine
Traffic safety: Testing the blood alcohol content of vehicle drivers when drinking or driving under the influence of alcohol
Brewing industry: determination of low boiling point aroma components in beer
Food industry: detection of residual 6 # solvent in extracted oil, quality control of colored wine, vinegar, soy sauce, residual acetaldehyde in packaging materials, residual 6 # solvent in extracted oil;
Quality inspection of drugs: organic residual solvents in drugs;
Environmental protection: determination of volatile halogenated hydrocarbons in surface water and tap water such as rivers, lakes, etc., and volatile halogenated hydrocarbons in drinking water
Hygiene and epidemic prevention: detection of residual solvents in drugs, analysis of disinfection and fumigation residues in medical supplies;
Material control: detection of residual acetaldehyde in beverage bottles; Detection of organic volatile compounds such as benzene, toluene, and xylene in coatings and paints.


Packaging printing: detection of residual organic solvents in flexible packaging bags
Characteristics and main functions of headspace sampling device ：
Instrument multi-mode headspace sampling device: high-pressure headspace sampling device;
Integrated design, compact structure, easy operation;
The metal isothermal body heating and temperature control headspace bottle has high temperature control accuracy, small gradient, good temperature consistency, and is simple and reliable, reducing various drawbacks that may be caused by constant temperature heating in oil baths;
²Microcomputer control, LCD Chinese character display, membrane keyboard, numerical input, main functions include:
1. LCD can display: method parameters, real-time working status, running time, year, month, day, hour and other brief items;
2. Headspace bottle, injection system and sampling (injection) catheter, three-way temperature control and constant temperature system;
3.3 independent foreign affairs, 8-level time program control, self starting and self stopping operation;
4. It has 9 methods for editing, storing, and calling at any time, achieving fast startup and analysis;
5. The GC and chromatographic data processing workstations can be synchronously started, and the device can also be started using external event programs;
6. LCD brightness can be adjusted according to the usage scenario;
7. The display board and program control board circuit have self checking function and fault display;
Equipped with an external carrier gas regulation system, the GC instrument can be used for headspace sampling analysis without any modifications or changes. If the original instrument carrier gas is used, the device can be regarded as an automatic sampling system module for use;
A set of headspace sampling device can simultaneously supply several GC samples for analysis, greatly improving work efficiency;
Through foreign affairs time programming, automatic functions such as pressurization, sampling, injection, analysis, and post analysis blowback can be achieved;
The principle of high-pressure injection reduces the adverse effects of valve injection;
The sampling and injection transfer tubes of the sample have automatic blowback function, which avoids cross infection of different samples;
For active substance analysis, a 0.53mm elastic quartz tube can be selected as the sample transfer tube;
Easy to achieve multiple repeated injections of the same sample bottle, facilitating the development and research of methods;
The key components used for the drive are imported pneumatic components;
Equipped with a measuring device to determine the sealing performance of the headspace bottle.
Main technical performance indicators of headspace sampling device:
Headspace injection device: (high pressure, pressurization, injection)
The temperature control range of the sample area is from room temperature to 350 ℃, with an increment of 1 ℃. The heating power is set at approximately 400W;
The temperature control range of the valve injection system is from room temperature to 160 ℃, with an increment of 1 ℃. The heating power is set at approximately 60W;
The temperature control range of the sample transfer pipeline is from room temperature to 160 ℃, with an increment of 1 ℃. The heating power is approximately 40W;
Temperature control accuracy: ＜ ±0.5℃ ；
Temperature control gradient: ＜ ±0.5℃；
Headspace bottle workstation: 9 positions;
Headspace bottle specifications: standard 20ml (10ml, 50ml, etc. can be customized);
Repeatability: RSD<3% (related to GC performance);
Injection pressure range: 0-0.4Mpa (continuously adjustable);
Backblowing cleaning flow rate: 0-20ml/min (continuously adjustable);
Effective size of the instrument: 180×360×400mm3；
The weight of the instrument is approximately 12 kg.