油籽 油和水分含量的同步测定 脉冲核磁共振光谱法

[中文适用范围]： 本国际标准规定了使用脉冲核磁共振（NMR）快速测定商业油料种子油和水含量的方法。 适用于含水量小于10%的油菜籽、大豆、亚麻籽、葵花籽等。 对于含水量较高的种子，必须先进行干燥，然后才能通过脉冲核磁共振测定含油量。 注 1：该方法已经用油菜籽、大豆、亚麻籽和葵花籽进行了测试。 然而，这并不排除其适用于其他油在测量温度下为液体的商业种子。 注 2：再现性值通常高于通过干燥法（ISO 665）获得的值。 [外文原描述]： This International Standard specifies a rapid method for the determination of the oil and water contents of commercial oilseeds using pulsed nuclear magnetic resonance (NMR). It is applicable to rapeseeds, soya beans, linseeds and sunflower seeds with a water content less than 10 %. For seeds with higher water contents, drying is necessary before the oil content can be determined by pulsed NMR. NOTE 1 This method has been tested with rapeseeds, soya beans, linseeds and sunflower seeds. This does not, however, preclude its applicability to other commercial seeds whose oil is liquid at the temperature of measurement. NOTE 2 The reproducibility values are generally higher than those obtained by the drying method (ISO 665)