La description

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 *9.**9%）, He  (Carrier*9.**9%)
Flow control:automatic control program, P /Po 0.*5 - 0.*5, control accuracy error ≤ 0.5%;
Control efficiency:0.*1 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.*1m2/g, no upper limits;
Sample NO:  4
Repeatability Accuracy:  ≤ ±1 %