MICROPACKED-ST: Specifications and Prices

Analytical Column for Gas Chromatography Applications

Conventional packed columns consist of tubes with inner diameters of 2-4 mm and lengths of 0.5-6 m, and which are packed with supports comprised of stationary phases coated with liquid phases. With changes in analytical trends, many varieties of packed columns have been replaced with capillary columns. However, because gaseous samples occupy large volumes and easily diffuse at room temperature, there are still a large number of unfavorable factors preventing a complete switch to capillary columns, with the result that many analyses of these kinds of samples still rely on packed columns. The MICROPACKED ST column was developed to be used in the same manner as capillary columns, as well as provide increased sample loading capacities.

Features

• MICROPACKED ST columns are packed with SHINCARBON ST.
• Can be used to analyze permanent gases using capillary GC systems.
• Can be used in GC/MS systems.
• Are capable of separating permanent gases (including CO and CO₂) at room temperature and above (cooling systems are not required).
• Columns are not affected by gaseous samples containing water vapor (water is not eluted as a peak).
• MICROPACKED ST columns boast larger sample capacities than PLOT capillary columns, and possess higher levels of column efficiency in comparison with conventional packed columns.
• Higher levels of column efficiency in comparison with conventional packed columns enable shorter analysis times.
• The support used in these columns possesses superior heat resistance (maximum operating temperature: 330℃), and is rapidly equilibrating.

Specifications

• Packing material: SHINCARBON ST 80/100 mesh
• Column dimensions: 2.0 m × 1.27 mm O.D. × 1.0 mm I.D. SUS
• Connection tubes: 0.5 m × 0.52 mm O.D. × 0.30 mm I.D. SUS
• Maximum operating temperature: 330℃

* Please be aware that column specifications may be changed without prior notification in order to implement improvements.

Application examples

Technical data

Relationship between column inlet pressure and carrier gas flow rate
（MICROPACKED ST 2.0 m × 1.0 mm I.D.）

Relationship between carrier gas flow rate and theoretical plate number
（Sample: Ethane, Temp. :200℃, Carrier gas: He）

Handling precautions

This product is a separation column designed for use in gas chromatographs. Do not use this product for any other purpose. Please read the following precautions in order to use this product correctly.

Precautions when unpacking this column

• Remove the column from its box by pressing down on the round foam rubber sheet located in the center of the column and pulling the column frame towards you. Exercise care when removing the column from its box, as the connection tubes attached to the ends of the column may spring back. When using this column, wear protective equipment including gloves and safety glasses, and exercise care in handling.

Precautions when using this column

• Avoid bending this column excessively. Excessive bending can lead to crushing of the packingmaterial inside the column and emissions of fine particles from the column.
• Do not allow kinks to form in the connection tubes attached to each end of this column. Kinks in connection tubes can lead to carrier gas leaks and blockages.
• The maximum operating temperature for this column is 330℃. Do not subject this column to temperatures higher than 330℃.
• When using this column at a temperature of 70℃ or higher, do not turn off the carrier gas.

Precautions when connecting this column to gas chromatographs

• As with general capillary columns, this column can be connected to gas chromatographs using ferrules. Please use wide-bore capillary column (0.53 mm I.D.) ferrules in order to connect this column.
• In the case of gas chromatographs that employ automatic flow controllers or analytical software to control carrier gas flow rates, actual carrier gas flow rates and split ratios, etc. will differ from values displayed. Enter dummy column dimensions (e.g., length: 250 m, inner diameter: 0.5 mm, film thickness: 10 μm) in order to achieve an appropriate level of carrier gas pressure and normal gas chromatograph control (no error outputs). When accurate carrier gas flow rates and split ratios are required, use a flow meter, etc. to measure the gas flow rates from the column and split outlets.