Amberized NMR tubes protect photosensitive materials from visible and ultraviolet radiation. These tubes provide optical transmittance values ranging from 0% to 50% in the 650nm to 300nm range (covering the visible spectrum), while virtually blocking all UV radiation from 300nm to 190nm due to glass’s inherent opacity to UV light.
Most borosilicate glass NMR tubes can be amberized, including all tubes from 3mm to 10mm O.D. in our Select Series™ and Standard Series™ product lines. Special purpose tubes also amberize readily, including valved tubes (with vacuum & reduced pressure, intermediate pressure, or high pressure assemblies), screw-cap tubes, constricted tubes, and medium or heavy wall configurations.
The amber coloration results from a high-temperature process that exchanges metal atoms within the glass structure, creating a permanent tint that resists chemicals, solvents, and physical abrasion. However, subsequent high-temperature operations such as glassblowing can weaken or eliminate the amber color.
Quartz NMR and EPR tubes cannot be amberized because they consist of pure silica without the metallic elements required for the amberizing process.
Now available with Ultra-Thin wall NMR tubes. NorLoc™ caps sold separately, Amberized NMR tubes ship with economy caps.
