1、 Instrument features
1. The technology related 10/100M Ethernet communication interface is adopted to realize remote control and remote data transmission processing or supervision of the instrument without distance limitation, and provide an easy integrated enterprise network and Internet solution, which can facilitate the connection between the unit director and the superior administrative director, and facilitate the real-time supervision of the director. It can be connected to the manufacturer through the Internet to realize remote diagnosis, remote program update, etc;
2. The workstation equipped with the chromatograph can support multiple chromatographs simultaneously to achieve data processing and control, reducing laboratory investment and simplifying document management;
3. The instrument is designed with a timed self starting program, which can easily complete online analysis;
4. The chromatograph is equipped with a high-resolution AD circuit and has the functions of baseline storage and deduction;
5. The chromatograph is designed with a USB interface, which supports printing spectra and analysis results with a universal USB printer, and supports storing spectrum data on a USB drive for future archiving and reanalysis;
6. A brand new microcomputer temperature control system with high temperature control accuracy, superior reliability and anti-interference performance; Equipped with a six channel fully independent temperature control system, capable of achieving eight order programmed temperature rise; Equipped with a column box automatic rear door opening system, with fast heating/cooling speed;
7. The operating system of the fully microcomputer controlled keyboard is simple and convenient to operate; Equipped with built-in detectors and automatic recognition technology; Capable of fault diagnosis and data protection;
8. Equipped with dual columns and dual gas paths, capable of installing 3 injectors and 2 detectors; It is very convenient to switch between packed column injection, direct injection into large-diameter capillary columns, and split injection into small-diameter capillary columns; Optional split/non split injector, gas injection valve, converter, pyrolysis (cracking) apparatus, headspace injector, thermal desorption device, etc;
9. Equipped with a constant hydrogen ignition system, achieving high repeatability of nitrogen to hydrogen ratio before and after ignition.
Motor vehicle drivers who drive under the influence of alcohol or alcohol are prone to accidents and road traffic incidents. In order to reduce the number of casualties caused by drunk driving and ensure traffic safety and smoothness, it is necessary to strictly investigate and punish drunk drivers in accordance with the law. The law enforcement basis for investigation and punishment is to test the blood alcohol content of drunk drivers using top air chromatography. If a death event occurs, according to forensic analysis, it is also necessary to measure the level of n-propanol in the blood.
2、 Application standards
2.1 GA/T105 Qualitative analysis and quantitative analysis methods for ethanol, methanol, n-propanol, acetaldehyde, acetone, isopropanol, n-butanol, and isoamyl alcohol in hematuria. Implemented on January 1, 1997 according to the standards of the Ministry of Public Security;
2.2 GB19522 Threshold and Testing of Blood and Breath Alcohol Content for Vehicle Drivers. (National Standard) Implemented on May 31, 2004;
2.3 DB31/205-2007 Blood Threshold and Testing Method for Motor Vehicle Drivers Driving (Shanghai Local Standard) Implemented on February 1, 2008;
The behavior of motor vehicle drivers while driving and the threshold of blood alcohol content
Behavioral category: Blood alcohol content threshold
Drinking and driving at a concentration of 0.2mg/mL (20mg/100mL)
Drunk driving 0.8 mg/mL (80 mg/100mL)
The relationship between blood alcohol content, symptoms, and accidents:
| Blood alcohol content mg/ml | symptom | Causing an accident |
| 0.50 | Spiritual happiness and a sense of relief | Possible accident |
| 1.00 | Excitement, blushing, incoherent speech | Increased likelihood of accidents |
| 1.50 | Excited and noisy | Easy to cause accidents |
| 2.00 | Inconsistent movements and disordered consciousness | There must have been an accident |
| 3.00 | Anesthesia state, entering a coma | There must have been an accident |
3、 Headspace gas chromatography for blood testing
principle
This method utilizes the volatility of ethanol, with tert butanol as the internal standard, and detects using headspace gas chromatography flame ionization detector; By comparing with ethanol standards operated in parallel, qualitative analysis is carried out based on retention time or relative retention time, and quantitative analysis is performed using the internal standard method based on the peak area ratio of ethanol to the internal standard.
Complete set of specialized instruments and accessories
1) Gas chromatograph: GC9800 (N) blood test dedicated networked gas chromatograph (equipped with flame ionization detector (FID), headspace analysis dedicated thermostat blood test dedicated chromatographic column, and blood test dedicated chromatographic workstation)
2) Gas source (H2, N2, Air) or hydrogen, air, nitrogen integrated machine
3) Headspace bottle sealing pliers
4) Headspace bottle
5) Silicone rubber pad Aluminum caps, etc
Main technical performance
Temperature control range: 8 ℃ to 399 ℃ above room temperature, temperature control accuracy: ± 0.1 ℃
Program heating: 8th stage, lift rate: 0.1-39 ℃/min
Stability: baseline drift ≤ 30 μ v/15min, noise ≤ 10 μ v
Sensitivity: FID， Detection limit D ≤ 2 × 10-11g/s (nC16)
