The national standard GB/T 28726-2012 "Gas Analysis - Helium Ionization Gas Chromatography Method", which was mainly drafted by Hua Ai Chromatography, has been officially announced and implemented since February 1, 2013.

1、 Helium ion detectorTechnical parameters:

1. Detection limit (ppb):

2. Temperature control indicators:

• Column box: 8 ℃ -400 ℃ at room temperature with an accuracy of ± 0.1 ℃
• Sample injector: Accuracy ± 0.1 ℃ at room temperature between 8 ℃ and 400 ℃
• Detector: Accuracy ± 0.1 ℃ at room temperature between 8 ℃ and 400 ℃
• Temperature control quantity: eight channels
• Program heating: 8th order
• Heating rate: 1 ℃~40 ℃
• Cooling rate: within 7 minutes (350 ℃ to 50 ℃)

3Helium ionization detector (PDD)：

• Discharge mode: Pulse discharge
• Baseline noise: ≤ 0.1mv
• Baseline drift: ≤ 0.5mv/30min
• Detection limit: ≤ 1.0 × 10-10g/ml

4. Carrier gas purifier:

• Purified gases: He, Ar, Ne, Kr, Xe, Rn
• Maximum operating pressure: 1000Psi
• Removing gases: H2, O2, N2, CO, CO2, CH4, H2O, NO, NH3, CF4, etc
• Residual concentration: ≤ 10pppb

5. Workstation performance:

• Communication interface: RS232/USB interface
• High precision: 24 bit high-precision A/D
• Resolution: ± 1UV
• Input voltage range: -5mv to+1v
• Sampling frequency: maximum 20 times/second
• Dynamic range: 106
• Integral sensitivity: 1 μ v • sec
• Linearity:<± 0.1%.
• Reproducibility: 0.06%.

6. Other parameters: size, weight, power supply:

• Dimensions: Width 655mm x Height 500mm x Depth 480mm
• Weight:~48kg
• Power supply: 220V ± 22V, 50Hz, power ≥ 2kW

2、 System configuration:

(1) GC-9560-PDD helium ion chromatograph (2)helium ionization detector（PDHID）
(3) Central cutting system (4) multi column box system
(5) Helium Purifier (6) Standard Gas
(7) Chromatography Column (9) Oxygen Adsorption and Reduction System
(10) Special pressure reducing valve for carrier gas (11), no dead volume dedicated sampling valve

(12) GC-9560V4.0 version reverse control chromatography work