1,Purpose and scope of application
The JPJX-2010A automatic thermal analyzer injection device is a sample pre-treatment device that can be used in conjunction with a gas chromatograph to detect volatile organic compounds in the environment. The minimum detection concentration can reach ppb level. The injection device of JPJX-2010A automatic thermal analyzer can not only meet the requirements of "Determination of Benzene in Indoor Air" and "Determination of Total Volatile Organic Compounds (TVOC) in Indoor Air" in GB50325-2006 "Code for Indoor Environmental Pollution Control of Civil Building Engineering", but also be applicable to the following fields:
1. Occupational safety, industrial health, and environmental monitoring;
2. Rapid identification of unknown atmospheres;
3. Analysis of spices and essence;
4. Toxic substance accident assessment (when personnel can safely return to the accident site);
5. Safety monitoring of the surrounding environment of the chemical weapons warehouse;
6. Quality control testing in polymer and packaging industries;
7. Evaluation of drug solvents and product purity;
8. Residual analysis of drugs and court samples;
9.Collect gas exhaled by patients and volatile drug metabolites in the blood in hospitals.
2,Working principle
To illustrate its working principle, we will give a typical example. For example, in the indoor environmental pollution control regulations of civil construction projects in China, it is stipulated to use thermal desorption/capillary gas chromatography method to detect total volatile organic compounds (TVOC) in indoor air. The process is as follows: first, select the adsorption tube filled with adsorbent (TenaxTA or TenaxGC, etc.), continuously inhale a certain volume of air sample under certain temperature and pressure conditions, and the TVOC in the air will be retained in the adsorption tube, After sampling, the adsorption tube is heated using a thermal analyzer (such as JPJX-2010A model) to desorb TVOC. The desorbed components are introduced into a capillary gas chromatograph for analysis using different methods. Qualitative analysis is performed using retention time, and peak height or peak area quantification is performed. The JPJX-2010A automatic thermal analyzer injection device is a new patented high-pressure injection device without a six way switching valve, which is directly introduced into the gas chromatography vaporization chamber through a sample transfer pipeline. Its advantages are: high recovery rate, maximum reduction of minimum detection concentration, and high precision of analysis.
The main characteristics of the injection device of JPJX-2010A automatic thermal analyzer are:
3,,Parameter Introduction
| Number |
Name |
Parameter |
| 1 |
Temperature control range of desorption furnace |
Room temperature~400 ºC, adjust the increment by 1 ºC |
| 2 |
temperature control accuracy |
<±0.5ºC |
| 3 |
Temperature control gradient |
<±0.5ºC |
| 4 |
Injection pressure |
Maximum 0.4MPa |
| 5 |
Instrument effective size |
230× 400 × 430 mm |
| 6 |
Instrument power |
500W |
| 7 |
Instrument weight |
10Kg |
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