Gas chromatography-mass spectrometer

Technical Indicators:

1、 Gas phase part

1.1 Program heating retention time repeatability（RSD）：≤0.1%(Actual measurement 0.04%);

1.2 Retention time difference:0.005min；

1.3 Excluding column boxes6 independent heating zones, 2 injection ports, 2 detectors, 2 auxiliary heating zones, maximum temperature in the auxiliary heating zone: 400 ℃;

1.4 diversion/Non split (S/SL) capillary injection port

1.4.1最高使用温度：400℃；

1.4.2Pressure setting range:0~700kPa;

1.4.3Total flow setting range:0~500 mL/min（N₂）；

1.4.4Maximum diversion ratio:600:1；

1.4.5Voltage control mode: constant current, constant voltage, program boost, program boost, pulse pressure;

1.5 column box

1.5.1Internal dimensions:280mm×310mm×160mm；

1.5.2Cooling method: rear door opening+Variable frequency motor;

1.5.3Operating temperature: above room temperature4℃~450℃；

1.5.4Resolution of temperature setting value:±0.1℃；

1.5.5Maximum heating rate of column box:120℃/min；

1.5.6Maximum running time:999 minutes;

1.5.7Every change in room temperatureChange in column temperature at 1 ℃: ＜ 0.01 ℃;

1.5.8Cooling time of column box: fromReduce 250 ℃ to 50 ℃ ≤ 4 minutes;

two、Mass spectrometry section

2.1 Ambient temperature15-35℃；

2.2 relative humidity≤75%；

2.3 Applicable power supply:220V(±10%)，50Hz(±2%)；

2.4 Ion source

2.4.1 Ion source material: Inert ceramic ion source, equipped with dual filaments; The maximum filament current is 400MA；

2.4.2 Sensitivity: EI Sensitivity: 1 pg OFN full scan mode S/N: 1000:1;

2.4.3 Ionization energy: 10-100eV;

2.4.4 Interface temperature: adjustable from 50 ℃ to 350 ℃, with an accuracy better than 0.1 ℃. The mass spectrometer is temperature controlled and does not occupy the auxiliary heating area of the gas chromatograph;

2.4.5 Ion source temperature: 50 ℃ -350 ℃;

2.5 Quality Analyzer

2.5.1 Quality analyzer: high-precision inert metal quadrupole with pre-set rod;

2.5.2 Quadrupole rod temperature: Quality stability can be ensured without temperature control;

2.5.3 Quality range: 1.5-1050 amu, software can set and detect;

2.5.4 Quality accuracy: 0.1u;

2.5.5 Quality axis stability: better than 0.1 amu/48 h;

2.5.6 Scanning methods: full scan (SCAN), selective ion monitoring (SIM), full scan, and selective ion synchronous monitoring;

2.5.7Select ion monitoring mode（SIM）canUnrestricted grouping；

2.6 Detector

2.6.1 Detector: Long life 13 level discontinuous dynode electron multiplier;

2.6.2 Maximum scanning speed: 20000 amu/s, with adjustable speed throughout the entire process;

2.6.3 Dynamic range: 10⁶；

2.6.4 Peak area reproducibility; Automatic injection RSD ≤ 5%;

2.6.5 Detection limit (IDL):<10fg; Octafluoronaphthalene, EI

2.7 Vacuum system: Mechanical pump pumping speed 4m³/h. Configure high-performance turbo molecular pump with a pumping speed of 250 L/s;

2.8 Maximum allowable chromatographic column flow rate 5

Standard configuration:

GC138N gas chromatography host

●MS8300 mass spectrometrydetector

●DB-5MS capillary chromatography column

●Large capacity helium capture trap

Optional:

●AS9Liquid automatic sampler

●Thermal desorption apparatus

●Blow and captureceremony

●Fully automatic headspace sampler