Helium ion detector

The GC-9560-PD helium ion chromatograph is suitable for detecting trace impurities in high-purity gases such as hydrogen, oxygen, argon, nitrogen, helium, neon, krypton, xenon, and carbon dioxide. The instrument is equipped with a highly sensitive helium ionization (PDHID) detector, using center cutting and blowback technology, and equipped with an injection switching valve and an imported helium purifier with a blowback protection gas path. Through non dead volume sampling or online sampling methods, the detection of common impurities such as H2, O2 (Ar), N2, CH4, CO, CO2, or hydrocarbons such as C1-C4 in the above high-purity gases can be completed in one go. The detection limit is up to ppb level, and the repeatability RS is reliable

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):

General impurities
Types of groceries	H2	O2（Ar）	N2	CH4	CO	CO2
inspectmeasurelimit	5	10	10	5	25	5

hydrocarbon
Types of impurities	C2H4	C2H6	C3H6	C3H8	C4H8	C4H10	iC4H10
inspectmeasurelimit	20	20	20	20	20	20	20

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