Available in three functional types, SpectraPor® Tubing Closures are intended for use with Regenerated Cellulose (RC) dialysis tubing to ensure a leak-proof seal. These closures are not recommended for use with Cellulose Ester (CE).
SpectraPor® Tubing Closures
SpectraPor® Closures are designed with tight-gripping seal ridges that provide a reliable leak-proof seal for thin-walled and more flexible dialysis tubing. These closures should be used only with RC and low MWCO (=< 20 kD) CE dialysis tubing. For best results, select a pair of closures that has a sealing width 4 to 10 mm longer than the flat width of the dialysis tubing to ensure a proper seal.
Made from polypropylene (PP) material, the compatibility of SpectraPor® Closures with specific solvents should be confirmed on the Repligen Chemical Compatibility table.
SpectraPor® Closures are available in three functional types for improved dialysis efficiency: Standard, Weighted and Magnetic.
Standard type closure
SpectraPor® Standard Closures float and aid in sample buoyancy when applied to the top-end of the dialysis tubing; autoclavable and available in a variety of colors for easy sample identification.
| Product Specifications | |
| Functional Benefit: | Sample buoyancy & vertical orientation |
| Membrane Types: | Standard RC only |
| 6 Sealing Widths: | 12, 23, 35, 55, 75 & 90 mm |
| 4 Colors: | Orange, white, green, blue |
| Quantity: | 10/pkg |
| Material: | Polypropylene |
| Temperature: | 0 - 121°C (autoclavable) |
Weighted Type Closure
SpectraPor® Weighted Closures have an encased stainless-steel bar for additional weight. When applied to the end of the dialysis tubing, the end turns downward to ensure a vertical orientation while providing a leak-proof seal.
| Product Specifications | |
| Functional Benefit: | Weighted for vertical sample orientation |
| Membrane Types: | Standard RC, Biotech RC & low MWCO Biotech CE (=< 20 kD), Not recommended for use with high MWCO Biotech CE (> 20 kD) |
| 6 Sealing Widths: | 12, 23, 35, 55, 75 & 90 mm |
| 1 Color: | White |
| Quantity: | 10/pkg |
| Material: | Polypropylene |
| Temperature: | 0 - 121 °C (autoclavable) |
Paired (Standard and Weighted) Closures
SpectraPor® Paired Closures combines 10 standard and 10 weighted closures for dialysis convenience. Optimal sample buoyancy and vertical orientation can be achieved by applying both a Standard and a Weighted closure to opposite ends of the same dialysis tubing.
| Product Specifications | |
| Functional Benefit: | Buoyancy and vertical orientation |
| Membrane Types: | Standard RC, Biotech RC & low MWCO Biotech CE (=< 20 kD), Not recommended for use with high MWCO Biotech CE (> 20 kD) |
| 6 Sealing Widths: | 12, 23, 35, 55, 75 & 90 mm |
| 2 Colors: | Orange (standard) and White (weighted) |
| Quantity: | 10 standard & weighted pairs/pkg |
| Material: | Polypropylene |
| Temperature: | 0 - 121 °C (autoclavable) |
Magnetic Type Closure
SpectraPor® Magnetic-Weighted Closures contain a magnetic fluorocarbon coated stainless steel bar, eliminating the need for conventional stir bars. Applied to the bottom end of the dialysis tubing, this closure provides complete sample submersion and rotation on a stir plate.
| Product Specifications | |
| Functional Benefit: | Vertical orientation and rotation |
| Membrane Types: | Standard RC, Biotech RC & low MWCO Biotech CE (=< 20 kD), Not recommended for use with high MWCO Biotech CE (> 20 kD) |
| 4 Sealing Widths: | 23 mm, 35 mm, 55 mm, 75 mm |
| 1 Color: | Red |
| Quantity: | 2/pkg |
| Material: | Polypropylene (PP), fluorocarbon-coated magnetic SS bar |
| Temperature: | 0 - 121 °C (autoclavable) |
Part Numbers
| Closure Type | Color | Sealing Width | Qty | |||||
| 12 mm | 23 mm | 35 mm | 55 mm | 75 mm | 90 mm | |||
| Standard | Orange White Green Blue |
132734 142734 142834 142934 |
132735 142735 142835 142935 |
132736 142736 142837 142936 |
132737 142737 142837 142937 |
132738 142738 142838 142938 |
132739 142739 142839 142939 |
10/pkg |
| Weighted | White | 132742 | 132743 | 132744 | 132745 | 132746 | 132747 | 10/pkg |
| Paired | Orange/White | 132749 | 132750 | 132751 | 132752 | 132753 | 132748 | 10 pairs |
| Magnetic | Red | - | 132760 | 132762 | 132764 | 132766 | - | 2/pkg |
Resources
Frequently Asked Questions | Dialysis