Patented Design Elements Allow Safe & Secure Closure
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.
NorLoc™ Caps work well with any NMR tube but are best when paired with Secure Series™ NMR sample tubes from Norell®. Internal components of NorLoc™ caps engage with the security band printed on our Secure Series™ NMR tubes and indicate one of two stages of closure.
The patented design of our 5mm NorLoc® NMR tube cap remarkably outperforms the only available alternative, the traditional 5mm NMR tube cap, as shown by the following evaporation test data:
Solvent
5mm Economy Cap
5mm NorLoc Cap
%w/w remaining
Solvent after 1 day*
%w/w remaining
Solvent after 10 days*
%w/w remaining
Solvent after 1 day*
%w/w remaining
Solvent after 10 days*
Acetone-d6 + 0.05%v/v TMS
99.86
97.08
99.98
99.51
Benzene-d6
97.79
68.50
99.86
87.74
Chloroform-d
96.19
53.83
99.69
79.96
Chloroform-d + 0.03%v/v TMS
96.25
53.13
99.65
80.34
DMSO-d6 + 0.05%v/v TMS
99.91
99.85
99.96
99.96
Methanol-d4
99.72
99.45
99.99
99.95
Dichloromethane-d2
93.00
37.20
99.31
81.82
*Samples were stored in open beakers on a lab bench for the specified time period at
an average room temperature of 72°F (22°C) and 50% - 60% relative humidity.
