Gravimetric-method physical absorption instrument
A technology of physical adsorption and gravimetric method, which is applied in the direction of using material absorption and weighing, etc., can solve the problems of high price of microbalances, increase the test cost, increase the volume of the instrument, etc., and achieve the effect of improving the test efficiency.
Active Publication Date: 2014-06-18
贝士德仪器科技(北京)有限公司
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Problems solved by technology
[0004] The existing problem is: the use of multiple microbalances not only increases the volume of the instrument, but also increases the cost of testing due to the high price of microbalances, and also makes the test efficiency lower
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[0016] The following clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0017] figure 1 Shown is a gravimetric physical adsorption instrument provided by the embodiment of the present invention, which can be used as a test instrument for low-temperature nitrogen adsorption or vapor adsorption. The adsorption instrument includes: a vacuum chamber, a microbalance, a multi-sample conversion device, a vacuum pump, a temperature sensor and a control device;
[0018] Wherein, the bottom end of the vacuum chamber is provided with a sample tube connection port;
[0019] The microbalance is set in the vacuum c...
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The invention discloses a gravimetric-method physical absorption instrument. The absorption instrument comprises a vacuum chamber, a micro balance, a multi-sample conversion device and a vacuum pump, wherein a sample pipe connector is arranged at the bottom of the vacuum chamber; the micro balance is arranged in the vacuum chamber; a plurality of testing parts are arranged at the bottom end of the micro balance; each testing part can stretch into the sample pipe connected with the vacuum chamber from the sample pipe connector of the vacuum chamber; the multi-sample conversion device is connected with the plurality of testing parts to drive the plurality of testing positions to convert the position of each testing part; the vacuum pump is communicated with the vacuum chamber by a pipeline and a valve. According to the absorption instrument, the plurality of testing parts are arranged at the bottom end of the micro balance and the plurality of testing parts are driven by the arranged multi-sample conversion device to convert the position of each testing part, so that a plurality of samples can be measured by one micro balance; not only the testing efficiency is improved, but also the cost and the volume of the absorption instrument are not increased.
Description
technical field [0001] The invention relates to the field of adsorption equipment, in particular to a convenient gravimetric physical adsorption instrument. Background technique [0002] Gas molecules or vapor molecules can be adsorbed by a solid surface. If the adsorbate molecules bind to the solid surface in a physical process similar to condensation, that is, they interact with the van der Waals force, which is called physical adsorption. Generally speaking, at a certain temperature, the easier the liquefied gas is, the easier it is to be adsorbed. The adsorption can be monolayer or multi-molecular layer, and the desorption is relatively easy. Physical adsorption is widely used in the determination of specific surface area and pore size distribution of materials, among which low-temperature nitrogen adsorption and vapor adsorption play an important role. The gravimetric vapor adsorption instrument is used to measure the vapor adsorption by the change of the weight of the...
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IPC IPC(8): G01N5/02
Inventor柳剑峰
Owner贝士德仪器科技(北京)有限公司