BELSORP-mini is a compact, volumetric, adsorption measuring instrument used for specific surface area and pore distribution measurement. Up to 3 samples can be measured simultaneously and independently with dedicated software, which makes operation of the instrument straightforward. BELSORP-miniII uses a new method for dead volume measurement, which enables high accuracy and reproducible data analysis to be performed. BELSORP-mini can be widely used for both research and QC in industry and academia.
7 BELSORP-miniII operation and technique
7 Specification
Features
Each port is equipped with a pressure sensor, and therefore up to 3 samples can be measured independently and simultaneously.
Pore sizes of 0.35 to 200 nm in diameter can be measured.
Specific surface areas as low as 0.01 m2/g can be measured.
Up to 4 BELSORP-mini units can be controlled from one computer.
Liquid nitrogen level control is no longer necessary because BEL Japan invented a new dead volume measurement method. As the result, high precision and high reproducibility data can be obtained.
Very compact space-saving unit
ISO 9277 and JIS Z 8830 compliant
CE certificate
Products >> Specifc surface area / Pore size distribution >>BELSORP-mini
· Overview
· Features
· Specification
BELSORP-mini operation and technique
BELSORP-mini uses volumetric method for adsorption measurement. In order to measure adsorption amount with volumetric method, volume of measuring system has to be measured precisely at the setout. Then, adsorption amount is measured from the change of gas pressure inside the measuring system by means of state equation of gas. With built-in 4 pressure sensors, high precision measurement can be carried out.
An adsorption measurement starts with sample pretreatment. After samples are set at BELSORP-mini and all the operation will be automatically carried out by the software starting with dead volume measurement followed by adsorption and desorption measurement. This reduces the possibility for human error and increases reliability and reproducibity.
Measurement data is analyzed by its dedicated software, and the data are displayed on a computer screen and can be printed out. The software has System-check function, which automatically make the diagnosis of the instrument.
> New dead volume measurement method
BEL Japan have developed a unique method to compensate for dead volume in the sample tube. Conventional instruments require that the level of liquid nitrogen is kept constant during a sample measurement. This creates problems with temperature variations in the top of the tube, large consumption of liquid nitrogen, or requires a complicated liquid nitrogen system.
The BELSORP-mini does not require a constant liquid nitrogen level. The change in dead volume due to changes in liquid nitrogen level and temperature, and atmospheric temperature are measured in another sample tube. For high precision measurements, this is performed at the same time as a measurement but for high throughput applications, this can be measured prior to the sample measurement. This method compensates for dead volume changes throughout the whole apparatus and so allows high accuracy data to be collected without time consuming or wasteful liquid nitrogen management.
> Data analysis
The analysis software for BELSORP-mini is Windows based. Analysis data can be saved in CSV format to be opened in other spreadsheet software packages. The software is very user friendly making it possible to produce good quality analysis printouts for reports or notebooks. The following analysis programs can be run:
<Analysis program>
Adsorption / Desorption isotherm
BET method
Langmuir method
as method
t method
MP method
BJH / CI / DH method
DA method
Differential adsorption isotherm
Molecular probe method
The software helps to compare multiple data by overlaying graphs. You may easily analyze some data by different analyses or compare with other data.