GC122-NPD Thermal conductivity cell detectorDetailed product description：

1、 Application scope of GC122-NPD thermal conductivity cell detector:

1) Analysis, monitoring, and research of trace toxins in environmental protection, atmosphere, water sources, and other pollutants; 2) Biochemistry, clinical applications, pathology, and toxicology research; 3) Analysis and research of trace components in food fermentation, microorganisms, and beverages; 4) Analysis of raw materials, intermediates, and finished products of Chinese and Western medicines; 5) Analysis, control, and exploration research in petroleum processing, petrochemicals, petroleum geology, and oil composition; 6) Composition research and production control in the fields of organic chemistry and organic synthesis; 7) Analysis and research in health quarantine, labor protection, and pollution detection; 8) Monitoring, control, and research in cutting-edge science and military science.

2、 Characteristics:
1. Newly designed high-performance HRGC
2. The instrument (base type) is equipped with dual FID detectors, optional GCl22-TCD thermal conductivity detector, GCl22-ECD electron capture detector, GCl22-NPD nitrogen and phosphorus detector, GCl22-FPD flame photometric detector, and accessories such as conversion furnace and gas injection valve.
3. The instrument (base type) has a dual packed column, dual injector, and dual gas path system structure, which can effectively suppress baseline fluctuations and drift in real time and is suitable for temperature programmed analysis; The instrument can install three types of detectors simultaneously, with different combinations of detectors used for different applications, and can achieve series and parallel operation of detectors.
4. The instrument (base type) is equipped with a complete capillary analysis system and an independent capillary splitter injector (including diaphragm cleaning, splitter and tail blowing adjustment). Optional capillary splitter/non splitter injector, cold column inlet injector, and 0.53mm large-diameter capillary direct injector. Suitable for capillary columns of different diameters, specifications, and lengths, such as glass and flexible quartz glass.
5. The instrument pneumatic system adopts high-precision calibrated flow stabilizing valves, pressure stabilizing valves, and needle valves. Flow regulation is convenient and intuitive, with good reproducibility and stability.
6. The instrument can achieve multiple injection methods, including column filling, instantaneous vaporization injection, and gas injection; Capillary column: Split flow injection, non split flow injection, direct injection of large-diameter capillary column.
7. A newly developed microcomputer temperature control system. It can simultaneously achieve high-precision (better than ± 0.1 ℃) and wide range (up to 400 ℃) temperature control for six heating zones including column box, ionization chamber, thermal conductivity cell detector, capillary sampler, and filling column sampler auxiliary (backup), with temperature overshoot and deviation less than 2 ℃ or lower.
8. The column box can achieve five stage programmed temperature control, with a maximum heating rate of 40 ℃/min.
9. The system has functions such as power-off protection, temperature limit setting, temperature scanning, rapid automatic cooling, and rear door opening.
10. The open microcomputer temperature control system can be equipped with RS-232 communication board and FJ-2000 chromatography workstation to achieve bidirectional communication control and data processing between the chromatography workstation and the instrument.
11. The full mirror stainless steel large capacity column box (350mm × 280mm × 300mm) can simultaneously install capillary columns and double packed columns; The internal heating wire structure is more conducive to quartz capillary column analysis.

3、 Main technical indicators:

temperature control	Temperature control range: 7 ℃ -400 ℃ at room temperature (incremental 1 ℃) Temperature controlled objects: Column box, ionization chamber, thermal conductivity cell, sampler A, sampler B, auxiliary (backup) Number of ascending orders: Five orders Cheng Sheng rate: 0.1 ℃ -40 ℃/min (incremental 0.1 ℃)
Flame ionization detector	Sensitivity: M ≤ 1 × 10-11g/s (sample: C16) Best test result: M ≤ 5 × 10-12g/s Baseline noise: ≤ 5X10-14A Baseline drift: ≤ 6X10-14A/h Linear range: ≥ 10six