title: Design and performance of a high pressure insert for use in a standard magic angle spinning NMR probe.
abstract: In this paper we describe the construction and performance of high pressure magic angle inserts made from the polymer PEEK. The inserts were designed to fit inside standard commercial 7 mm magic angle spinning rotors and spin at the maximum frequency of the probe. The sample volume of the inserts was 100 microL. A gas loading chamber that operates at room temperature is described. The performance of the inserts is discussed for a number of gases in terms of resolution as a function of spinning speed and leakage of the gas due to permeation through the polymer. Finally, some preliminary results are shown in relation to complex food materials.
authors.affiliation: Universidade Catolica Portuguesa, Porto, Portugal.
authors.forename: Teresa
authors.initials: T
authors.lastname: Deuchande
authors.forename: Olivier
authors.initials: O
authors.lastname: Breton
authors.forename: Josefin
authors.initials: J
authors.lastname: Haedelt
authors.forename: Eric
authors.initials: E
authors.lastname: Hughes
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D005740:Gases / Q000032:analysis* / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000295:instrumentation*; D011312:Pressure; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013113:Spin Labels; D014159:Transducers
chemical_list: D005740:Gases; D013113:Spin Labels