Norell pioneered the first high throughput NMR sample tube through its introduction of the “Select Series” line  in 1977. manufactures NMR/ EPR tubes for researchers out of ASTM Type 1 Class A glass. Nuclear magnetic resonance (NMR) spectroscopy is a technique that detects the chemical environment of atomic nuclei by the absorption of radio-frequency electromagnetic radiation when in the presence of a high magnetic field. NMR is used in chemistry and related fields for high-resolution molecular structure determination and the study of molecular dynamics.