الوصف

Test principal:Continuous Flow Chromatography method, Low temperature nitrogen adsorption
Test methods:Direct Comparison method
Gas: mixed gas of high purity nitrogen and helium (The proportion of nitrogen and helium is 3/7; and gas purity is *9.**9%).
Flow control:automatic control program, P / Po 0.*5 - 0.*5, control accuracy error ≤ 0.5%;
Measuring range:  Surface area ≥ 0.*1m2/g, no upper limits;
Sample NO:   one standard sample and 3 samples tested
Test Efficiency:   Direct comparison measures specific surface area: *5 minutes for three samples
Repeatability Accuracy:  ≤ ±1 %
Data acquisition: high-precision data acquisition and processing chip, high anti-interference ability.