| 摘要 |
<p>In a method of increasing the likelihood of detection of the presence of a material by nuclear magnetic resonance apparatus, an additive which is chosen to be readily detectable by the apparatus is incorporated in the material. The additive may, for example, comprise fluorine nuclei and/or phosphorus nuclei. The additive may be selected such that its presence characterises the particular type of material in which it is incorporated.</p> |
