Variable Speed   During sample preparation, the vials can be agitated continuously or the shaker can be programmed to operate for specific periods of time. The PL-SP 260VS provides variable, user-selectable shaking speed, which is easily adjustable via the front panel of the instrument. For additional safety with noxious eluents, an extraction hood can be fitted during the dissolution stage, which also enables purging with nitrogen for air-sensitive samples.  

Choice of Vial Types   The aluminum blocks for the heated compartment are available in several formats to accommodate a variety of vial types. The Standard Accessory Kit is designed to be used with standard sample preparation vials (supplied) and either PL-GPC 220 2 mL autosampler vials or Waters’ 4 mL autosampler vials. The Custom Accessory Kits permit alternative vials to be specified by the customer.  

Efficient Dispensing   A unique pipettor device efficiently dispenses filtered sample solution from the sample preparation vial directly into destination (autosampler) vials, with minimal handling.  

Choice of Filtration Media   Two filtration media are available:  

• Glass fiber (nominal porosity 1 µm) - the preferred system for general applications  
• Porous stainless steel (nominal porosity 0.5 µm, 2 µm, 5 µm or 10 µm)  

Both types are suitable for the removal of crosslinked polymer ‘gel’ or insoluble additives. Filter porosity should be selected based on the molecular weight of the polymer under investigation. The glass fiber depth filter is particularly suitable for polymers containing very fine particulates (e.g. carbon black and other pigments), yet is suitable for use with even high molecular weight polymers. Every filter magazine houses four filters.