The preparation of a cabbage reference material for environmental monitoring and food analysis

Cabbage is frequently used in environmental monitoring and food control, an d, hence, cabbage reference materials (RMs) are required for ensuring quali ty assurance. A cabbage RM was prepared in view of certification of specifi c elements from the "black list" of high toxicological interest and nutriti ve importance. All tasks of the RM production (production of the plant mate rial, cutting and freeze-drying, determination of the residual water conten t, preparation of the RM, homogeneity testing, stability testing, certifica tion measurements) are described in detail.