NorLoc™ Generation II Security Caps

Safeguarding Critical and Precious Samples Against Losses

Advance to the next level of sample security, personal safety and time savings. Combine NORELL® NorLoc™ II Security Caps™ with NORELL® Secure Series™ NMR tubes and experience the ultimate sample containment system.

The standard 5mm and 3mm NMR tube cap designs have existed for decades. Many users can attest to the significant flaws inherent in the traditional NMR tube caps, especially when faced with the chore of capping numerous sample tubes.

The NorLoc™ II Security Caps™ feature an internal patent pending design improvement that not only addresses many of the flaws in the traditional NMR tube caps, but the superior design of the NorLoc™ II Security Cap introduces many substantial improvements not found in any other NMR tube caps.

The NorLoc™ II Security Cap™ can be applied much more easily and quickly, thereby increasing personal safety and saving valuable time. It incorporates an advanced dual seal design, conferring superior sealing and holding capabilities, especially when combined with a Secure Series™ or other NORELL® NMR tube having the Security Band™ which interlocks with the NorLoc™ II Security Cap™.

This interlocking capability results in superior retention of the cap to the NMR tube, forming a “vaulted seal” that not only increases the barrier capability when used with any NMR tube, but the locking interaction prevents the occurrence of NMR tube and cap separation, safeguarding precious or critical samples, even during refrigerated cold storage, variable temperature cycling or repeated cap removals and reapplications.

The patent-pending design of the NorLoc™ II Security Cap™ includes an expanded entryway, or guide section, in the opening of the cap, to help align and start the placement of the cap on the NMR tube. Adjacent to this, a constriction within the cap forms a tight, effective seal against the wall of the NMR tube, followed by a second constriction that functions in a like manner to form a dual seal. Finally, the innermost region expands slightly in diameter, allowing the NMR tube to slip easily through to the end, creating a positive indication of proper placement and “lock”, ensuring a “vaulted seal” every time.

In addition, the upper, straight edge of the patent pending marking or label area on Secure Series™ or other NORELL® NMR tubes functions as a clear visual indicator, defining the limit for full and complete closure with the NorLoc™ II Security Cap™.

When preparing dozens, or even hundreds, of samples for analysis, tube capping can consume a significant amount of time. The traditional cap must first be held at an angle to the NMR tube to start placement of the cap, and then it must be stretched and twisted onto the tube. This becomes a tedious exercise after capping a few dozen tubes and often results in caps that are tilted and misshapen, promoting poor seals and split caps. This process also creates significant mechanical stress in the glass NMR tube, and can frequently lead to broken tubes, spilled sample and worse, including cuts or other injuries.

With the NorLoc™ II Security Cap™ however, the NMR tube easily enters the expanded guide section, and thereafter becomes self-aligning, allowing the cap to be simply pushed straight onto the tube. This method takes advantage of the compressive strength of glass while minimizing the common causes of glass fracture from radial and torsional stresses induced in the glass from stretching and twisting traditional caps onto the NMR tube at an angle.

Proper, trouble-free closure of NMR tubes is ensured by the combination of NorLoc™ II Security Caps™ with Secure Series™ or other NORELL® NMR tubes, creating a “vaulted seal” that resists tube and cap separation even with troublesome NMR solvents such as chloroform-d, providing precise, uniform cap positioning and seal integrity, safeguarding critical and precious samples against losses caused by evaporation, contamination or degradation due to atmospheric exposure.