Application
Commonly used in the analysis of vegetable oil solvent residues, alcohol analysis in the blood of drivers or pedestrians after a traffic accident when drunk driving; plastic packaging solvent residue detection; residual solvents of organic polymer materials such as resins and plastics; analysis of volatile substances in biological samples; pharmaceuticals Detection and analysis of organic residual solvents by headspace chromatography; headspace analysis of monomers in latex paint; material control: detection of acetaldehyde residues in beverage bottles Brewing industry: determination of low-boiling aroma components in beer; forensic science: blood, urine Inspection of volatile poisons such as alcohols, aldehydes and ketones; pharmaceutical industry: detection of residual solvents in drugs, identification and analysis of toxic gases and volatile poisons in criminal cases; environmental protection: surface water such as rivers, rivers, lakes, etc. This instrument is used for the determination of volatile halogenated hydrocarbons in tap water, and many industries need to control product quality or develop new products. This analytical method can avoid overloading and contamination of analytical columns caused by moisture, high boiling point substances or non-volatile substances. And the operation is simple, fast, sensitive, reliable, and accurate.
Features
Main performance characteristics:
- There are as many as 20 headspace bottle stations, and the metal body is heated, with high temperature control accuracy and small gradient.
- Touch the color screen, through time programming, automatically realize the functions of pressure, sampling, injection, analysis, and backflushing after analysis.
- Not only the status of each time course is displayed on the screen, but also the status of various types of work also has flashing light prompts, which greatly facilitates the user’s operation and use.
- It is equipped with an external loading gas adjustment system, which can perform headspace sampling analysis without any modification or change to the GC instrument. The original instrument carrier gas can also be used to make the installation very simple.
- Using pressure balance sampling technology, headspace sampling can obtain narrow chromatographic peak shapes.
- The sample transfer tube and injection valve have automatic backflushing function to avoid cross-contamination of different samples.
- For active material analysis, an elastic quartz tube can be selected as a sample transfer tube.
- The injection volume can be adjusted at any time according to the concentration of the sample to be analyzed by the customer.
- The injection needle is easy to replace and can be connected to all types of GC injection ports at home and abroad.
- Curved structure, beautiful, generous, and practical.
Microcomputer program control, the main functions are:
- Method parameter setting, real-time working status, three-way temperature control, each running time.
- Sample area, injection valve system and sample transfer tube, all three channels are individually heated and controlled.
- Set the control program, press the start button to automatically complete the entire sample analysis.
- 9 methods can be stored, convenient to call at any time, realizing quick start and analysis.
- The GC and chromatographic data processing workstation can be started synchronously, and the device can also be started by an external program.
Technical Parameter
| Model | DK-7820 |
| Temperature control range of sample area | Room temperature—300℃ in increments of 1℃. Maximum heating power 540W.
|
| Temperature control range of valve sampling system | Room temperature—180°C in increments of 1°C, the maximum heating power is 60W. |
| Temperature control range of sample transfer pipeline | Room temperature—200℃ in increments of 1℃. The maximum heating power is about 100W. |
| Temperature control accuracy | <±0.5℃ |
| Temperature control gradient | <±0.5℃ |
| Headspace bottle station | 20 |
| Headspace bottle specifications | optional 20ml, 10ml (50ml and other specifications can be customized) |
| Repeatability | RSD ≤3% (200ppm ethanol in water, N=5) |
| Injection volume control mode | Injection time and pressure control injection volume |
| Injection pressure range | 0～0.4Mpa (continuously adjustable) |
| Backwash cleaning flow | 0～400ml/min (continuously adjustable) |
| Effective size of the instrument | 400×360×180mm3 |
| The weight of the instrument | 15 kg |
Advantages
- Large color LCD display, touch screen keyboard
- There are as many as 20 headspace bottle stations, and the metal body is heated, with high temperature control accuracy and small gradient.
- Touch the color screen, through time programming, automatically realize the functions of pressure, sampling, injection, analysis and backflushing after analysis.
- Not only the status of each time course is displayed on the screen, but also the status of various types of work also has flashing light prompts, which greatly facilitates the user’s operation and use.
- With an external loading gas adjustment system, headspace sampling analysis can be carried out without any modification or change of the GC instrument, and the original instrument carrier gas can also be selected,
Making the installation very simple.
- Method parameter setting, real-time working status, three-way temperature control, each running time.
- Sample area, injection valve system and sample transfer tube, all three channels are individually heated and controlled.
- 9 methods can be stored, convenient to call at any time, realizing quick start and analysis.
