1.1. Working voltage: 220V ± 5%, 50Hz

1.2. Temperature: 18-26⁰C (optimal environment); 15-31⁰C (Operating Environment)

1.3. Relative humidity: 40-80%

1.4. Small desktop gas chromatography-mass spectrometry system, no need for water cooling system

2Mass spectrometry performance indicators

2.1 Ion source

2.1.1 Integrated ion source component design, including repulsion electrode, ion box, and lens group. The ion source can be disassembled as a whole without stopping the pump to remove the vacuum.

2.1.2 Non coated inert material, independently heated and controlled by ion source, with a temperature of up to 350 ° C; reduces maintenance and increases operating time.

2.1.3 Provide a separate lens heating plate independent of the source heating plate, providing additional temperature control for the lens and ion optical channel to prevent contamination of ion optical components by complex substrates.

★ 2.1.4 Equipped with a vacuum locking device, cleaning the ion source does not require stopping the pump to remove the vacuum.

2.1.5 Electron beam calibration of magnetic field is beneficial for improving ionization efficiency.

2.1.6 Precise adjustment of filament emission current up to a maximum of 350 µ A

2.1.7 The ionization energy can be adjusted from 0-150 eV. For compounds that are prone to fragmentation, low ionization energy is beneficial for the production of high-quality terminal ions in the compound.

The adjustable gas interface temperature of 2.1.8 can reach up to 400 ° C, effectively transferring compounds, including high boiling point compounds, from GC to mass spectrometer.

2.1.9 Integrated, co directional, and filament lens protected dual filament assembly design, effectively regulating the emission current. The filament has lens protection, which prevents contamination during sample ionization and improves its service life. The dual light wire can be used for both EI mode and CI mode.

2.2 S-type pre quadrupole rod

★ 2.2.1 S-type pre quadrupole reduces background neutral noise without setting instrument thresholds, background subtraction or smoothing operations, improving the detection and quantification limits of low concentration compounds, while protecting the main quadrupole from contamination and avoiding regular replacement of the main quadrupole.

★ 2.2.2 The S-type pre quadrupole has an RF lens protective sheath to prevent contamination, and disassembling the RF lens protective sheath does not require stopping the pump to remove the vacuum.

2.3 Four level Rod Mass Analyzer

★ 2.3.1 Full metal molybdenum main four stage rod, inert, uniformly uncoated design, can be polished and cleaned. Adopting an open four stage rod design and high vacuum inside the mass analyzer, it reduces the possibility of collisions between ions and other ions or neutral molecules, providing high ion transport efficiency.

★ 2.3.2 Quality range: 1.2-1100 u

2.3.3 Resolution: Resolution per unit mass over the entire mass range

2.3.4 Scanning rate: up to 11111 u/sec within the full quality range (1.2-1100 u)

★ 2.3.5 Acquisition rate: SIM mode, acquisition rate>240 scans/sec

Full scan mode, when the scanning range is>50 u, the acquisition rate is>110 scans/sec

2.3.6 Sensitivity

★ 2.3.6.1 EI full scan: 1 pg/µ L octafluoronaphthalene injection 1 µ L, scanning range 50-300u, S/N ≥ 600:1 (mass 272, RMS)

★ 2.4 Detector System: A new generation of discrete electron multipliers and electrostatic meters, with a maximum linear output current of 68 µ A and a linear dynamic range of up to 9 orders of magnitude.

2.5 Vacuum system:

★ 2.5.1 High performance molecular turbo pump with air cooling and high vacuum and pumping speed>300L/s; Mechanical pump is 3.3 meters long³/min.

2.5.2 Equipped with automatic leak detection function: It automatically detects the content of air itself, rather than using air as a reference with an unstable calibration gas for leak detection, thus avoiding leakage detection errors caused by changes in instrument sensitivity or differences between instruments.

2.6 Instrument Control

2.6.1 Ability to collect bar graph and contour graph data

2.6.2 Provide full scan, selective ion scan, and alternating full scan/selective ion scan.

2.6.3 Provide full scan/selective ion scan segmented mixed scan, which can simultaneously complete qualitative analysis of unknown compounds and quantitative analysis of target compounds with one injection.

2.6.4 It is possible to control the scanning speed, scanning range, ion polarity, bar graph or contour plot acquisition, emission current, detector gain, and chemical source gas flow rate of each scan segment by specifying tuning files.

3 Gas Chromatography Technical Indicators

3.1 Column temperature box for rapid heating and cooling

3.1.1 Column box temperature: 4 ℃ to 450 ℃ at room temperature

★ 3.1.2 31 stage and 32 stage program heating, heating rate 0.1-125 ℃/minute

3.1.3 Temperature raising (lowering) ability: It takes 5 minutes to raise from 50 ℃ to 450 ℃, and 240 seconds to lower from 450 ℃ to 50 ℃

3.1.4 Column temperature variation accuracy with room temperature:<0.01 ℃/℃

3.2 Carrier gas flow control: Unique electronic pressure control and flow control (DCC), with a maximum pressure of 1000kPa and a control accuracy of 0.01kPa. It has multiple functions such as temperature, pressure compensation, leak detection, column evaluation, calculation of linear velocity and void time, and gas saving.

★ 3.3 Split/non split injection port: equipped with DCC, temperature range from 50 ℃ to 400 ℃, increasing by 1 ℃; Split ratio 12500:1

3.4 Automatic liquid sampler

★ 3.4.1 Equipped with a 105 bit automatic sampler

3.4.2 Minimum injection volume: 0.1uL

3.4.3 Injection accuracy: RSD<0.6%

5 Data System

5.1. Real time and dynamic display of TIC and mass spectra in the experiment

5.2. The workstation can comprehensively control all parameters of chromatography, mass spectrometry, and automatic sampler, and automatically (or manually) tune all working parameters of mass spectrometry

5.3. Qualitative and quantitative browsers, as well as automatic retrieval and result reporting for more than 10 spectral databases simultaneously

5.4. NIST11 spectral library, self built spectral library available

5.5. Qualitative and quantitative data processing can be automated, including individual data and batch processing, or manually processed to generate reports

5.6. Xreport Report Wizard, customize analysis reports for different laboratory requirements according to various requirements

5.7. Can provide data processing software for laboratories in different industries (ToxLab Forms, EnviroLab Forms, and QuanLab Forms)

7. Technical Services

7.1. The supplier shall provide a complete operation manual and relevant training materials.

7.2. After receiving the installation notice from the owner, the manufacturer shall send personnel to the user's site for installation and debugging within 7 days. After installation and debugging, it should be ensured that the technical parameters and indicators of the instrument meet the requirements.

7.3. The supplier shall provide technical training and practical experience for two operators of the buyer at a dedicated training center, including the basic principles, operation, and maintenance knowledge of the instrument.

7.4. Maintenance services: It should have reliable maintenance service capabilities, fixed and reliable maintenance stations within China, and a high-quality professional maintenance team. After receiving user maintenance requests, it should be able to respond quickly within 24 hours;

7.5. After installation, debugging, and acceptance, the instrument must have a one-year free warranty period and guarantee lifelong maintenance.

7.6. Manufacturers should have formal and dedicated maintenance stations and bonded warehouses for spare parts. Manufacturers should ensure long-term supply of spare parts and normal after-sales service.