Helium ionization gas chromatograph

The GC-9560-PDD helium ionization gas chromatography instrument is suitable for the detection of trace impurities in high-purity gases such as hydrogen, oxygen, argon, nitrogen, helium, neon, krypton, xenon, carbon dioxide, etc. The instrument is equipped with a high-sensitivity helium ionization (PDIHID) detector, using center cutting and blowback technology, equipped with an injection switching valve with a blowback protection gas path and an inlet helium purifier, and can complete the above high-purity gases in one go through dead volume sampling or online injection methodsH₂、O₂（Ar）、N₂、CH₄、CO、CO₂Common impurities orC₁-C₄The detection limit for hydrocarbons reaches ppb level, with a repeatability RSD of ≤ 1%.

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、 Applicable standards:

GB/T3634.2-2011 "Pure Hydrogen, High Purity Hydrogen, and Ultra Pure Hydrogen" GB/T 14599-2008 "Pure Oxygen, High Purity Oxygen, and Ultra Pure Oxygen"
GB/T 8979-2008 "Pure Nitrogen, High Purity Nitrogen, and Ultra Pure Nitrogen" GB/T 4842-2006 "Argon"
GB/T 4844-2011 "Pure Helium, High Purity Helium, and Ultra Pure Helium" GB/T 17873-1999 "Pure Neon"
GB/T 5829-2006 "Krypton" GB/T 5828-2006 "Xenon"
HG/T 3633-1999 "Pure Methane" GB 10621-2006 "Food Additives - Liquid Carbon Dioxide"
GB/T 23938-2009 "High Purity Carbon Dioxide" GB/T 28125.1-2011 "Determination of Hazardous Substances in Air Separation Processes"

2、 Technical 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 ℃)

3. Helium 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

• Operating pressure: 1000Psi

• Gas removal: H₂、O2、N2、CO、CO2、CH4、H2O、NO、NH3、CF4 等

• 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: 20 times/second

• Dynamic range:10⁶

• Integral sensitivity: 1 μ v • sec

• Linearity:<± 0.1%. < span=''>

• 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

3、 System configuration:

(1) GC-9560 gas 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 Reverse Chromatography Workstation