The Specification of SPE Cartridge
Mostly, the common SPE cartridges are syringe-type devices which are made of polyethylene materials. There are two pieces of patches which are made of polypropylene or glass fiber.
What works in the SPE cartridge is the chromatographic absorbent in the middle of the batches. Open upper end and liquid outlet of the lower end, this structure allows the liquid to expel from the outlet after flowing through the adsorbent. According to the volume of space above the adsorbent in the cartridge, the specification can be roughly specified as below: 1 ml, 3 ml, 6 ml, 10 ml, 15 ml, 20 ml, 30 ml, 60 ml and so on.
Also, the SPE cartridges of special specification can be manufactured according to specific application requirements. From the appearance, most of the SPE cartridges are the syringe type. Some of the cartridges are in a funnel shape, and this type makes it convenient for loading more samples at one time when in manual manipulation.
The SPE cartridge without sieve plate is a new kind of one body style cartridge. Using the special processing on C18 and C8 bonded silica gel adsorbent, this kind of SPE cartridge has relatively high mechanical strength and strong toughness.