Principle of formaldehyde analyzer for liquefied gas：Liquefied gas analysis includes component analysis of liquefied gas and analysis of dimethyl ether, methanol, and formaldehyde in liquefied gas, excluding alkynes. It uses a gas chromatograph with a thermal conductivity detector to separate each component in the sample using a chromatographic column. The area normalization method or calibration area normalization method is used, and the percentage content of each component is measured by external standards.

GC-2020 typeFormaldehyde analyzer for liquefied gasPerformance characteristics

1. Adopting320 x 240dot matrix5.7An inch large screen LCD Chinese display, real-time display of various temperatures and operating conditions, clear and intuitive content, truly realizing human-machine dialogue;
2Power on self-test, wide range self diagnostic function, can accurately determine the fault location and alarm;
3Six independent temperature controls (vaporization chamber and capillary vaporization chamber can be independently controlled), Five level program heating function;
4Overtemperature Protection function: If any circuit exceeds the set temperature, the instrument will automatically power off and sound an alarm;
5The vertical heating device of * makes sample vaporization more reliable, reduces the heat radiation generated in the vaporization chamber to the minimum, and ensures minimal temperature deviation inside the column box;
6Intelligent fuzzy control rear door opening system, automatically tracks temperature and dynamically adjusts The angle of the air door can achieve precise temperature control even near room temperature;
7Configure filling column head injection, glass lining injection, with diaphragm cleaning Functional capillary diversion/Non split injection device and capable of installing gas injectors;
8High precision dual stable gas path, capable of installing four types of detectors simultaneously;
9Optional electronic flow pressure display system with built-in workstation device.

Temperature control indicators
1.Temperature control range: room temperature 5℃～400℃ increment0.1℃
2.Temperature control accuracy: superior to±0.01℃

Program heating: Five step interval constant temperature time0～999minincrement0.1minTemperature increment0.1℃
Heating rate:200℃The biggest one below40℃/min200℃Up to the biggest20℃/min

Main technical specifications of the detector

Hydrogen flame ionization detector（FID）

（1）Cylindrical collection electrode structure design, quartz nozzle, responsive*

（2）Detection limit:≤8×10g/s（HEXADECANE/isooctane）

（3）Baseline noise:≤2×10A

（4）Baseline drift:≤2×10A/30min

（5）Linear:≥10

Thermal conductivity detector（TCD）

（1）Adopting a semi diffusive structure

（2）The power supply adopts constant current control mode

（3）Sensitivity:≥2500mV·ml/mg（HEXADECANE/isooctane）.

（4）Baseline noise:≤20μV.

（5）Baseline drift:≤100μV/30min.