Test principal: Continuous Flow Chromatography method, Low temperature nitrogen adsorption

Test methods: Direct Comparison method, BET (single-point, multi-point), Langmuir surface area

Adsorption gas:  N2 (Adsorbate 99.999%）, He  (Carrier99.999%)

Flow control: automatic control program, P / Po 0.05 - 0.35, control accuracy error ≤ 0.5%;

Control efficiency: 0.01 ml / min, each point of P/Po adjustment ≤ 5 seconds

Calibration: the quantitative volume of nitrogen used for calibrating automatically

Measuring range: Surface area ≥ 0.01m2/g, no upper limits;

Sample NO:  4

Test Efficiency: Direct comparison measures specific surface area: 5-8 minutes per sample

BET surface area: 25 minutes per sample

Repeatability Accuracy:  ≤ ±1 %