As a new type of inexpensive getter, Ag400 molecular sieve has broad application prospects. The hydrogen adsorption rate of the Ag400 sample has been measured by the constant volume method in the process of pressure swing. The volumes of the apparatus chambers and the orifice conductance under different inlet pressures were calibrated, and the apparatus performance was tested. To ensure high accuracy, some experimental tricks including the loading of the getter and the condensing of the water vapor were implemented. The results showed that the initial adsorption rate of Ag400 is 3.26 × 10⁻⁶ m³ s⁻¹ g⁻¹ when the sorbed gas pressure is 0.086 Pa, which is 1/13 of the rate of PdO under the corresponding pressure. The results also showed that both the sorbed gas quantity and the sorbed gas pressure have a nonlinear effect on the adsorption rate of the getter, and 0.2 Pa is a critical point to estimate the Ag400 performance in limiting operational regimes. Subsequently, a surface plot of the adsorption rate was drawn by fitting, and its possible application was introduced. The test data was provided as supplementary material, and its measurement uncertainty and cumulative error were less than 2% and 5%, respectively.

Ag400分子筛作为一种新型廉价的吸气剂，具有广阔的应用前景。Ag400样品在变压过程中的吸氢率采用定容法测定。校准了不同入口压力下的装置腔室体积和孔口电导，并测试了装置性能。为了确保高精度，实施了一些实验技巧，包括吸气剂的加载和水蒸气的冷凝。结果表明Ag400的初始吸附率为3.26×10 ^-6  m ³  s ^-1  g ^-1当吸附气体压力为 0.086 Pa 时，是相应压力下 PdO 速率的 1/13。结果还表明，吸附气体量和吸附气体压力对吸气剂的吸附速率具有非线性影响，0.2 Pa 是评估 Ag400 在限制操作范围内的性能的关键点。随后，通过拟合绘制了吸附率的曲面图，并介绍了其可能的应用。试验数据作为补充材料提供，其测量不确定度和累积误差分别小于2%和5%。