This part of ISO 10633 specifies a method for the determination of the content of the different glucosinolates in crucifer oilseeds. NOTES 1 This method does not determine glucosinolates which are substituted on the glucose molecule, but these compounds are of little importance in commercial rapeseed. 2 This method allows determination of intact glucosinolates. However, it does not identify and quantify the products formed from the degradation of glucosinolates during preparation of the meal. Therefore, the antinutri-tional effects of these degradation products cannot be taken into consideration.