Specificatios Emperature index of column oven: 1. Temperature range of column oven: 5° C~399° C above room temperature (increment 1° C) 2. Temperature control precision of column oven: Better than ± 0.1° C(measurement under 200° C) 3. Temperature programming of column oven: Five stage 4. Temperature programming rate setting: 0.1° C~40° C/min(increment 1° C) measurement under 200° C Constant temperature hours at each stage: 0~655min(increment 1min) Thermal conductivity detector(TCD): 1. Sensitivity: S≥ 3000mv. Ml/mg 2. Baseline noise: ≤ 20μ V 3. Baseline drift: ≤ 50μ V/30min Flow rate stability of carrier gas: ≤ 1% Flame ionization detector(FID): 1. Detectability: ≤ 8× 10-12g/s 2. Baseline noise: 5× 10-14A 3. Baseline drift: ≤ 2× 10-13A/30min Temperature index of sampler, detector, thermal conductivity cell: 1. Temperature range: 5° C~399° C above room temperature (increment 1° C) 2. Temperature control precision of column oven: Better than ± 0.1° C(measurement under 200° C) Instrument use requirements: Supply voltage: 220V~± 22V 50Hz± 0.5Hz Rated power: <1800W Ambient temperature: +5° C~+35° C Relative humidity: ≤ 85% There must be no corrosive gas and electric field or magnetic field that affects normal operation in the location where the instrument is installed. The instrument table shall be stable, with vibration forbidden. There must be no electric furnace and fire within 2m around the hydrogen cylinder.