The European standards for sampling, sample reduction and sample treatment art regarded as important and this area seems to be a weak point within the process tc determine fuel properties. There are doubts in different EU countries whether the samples drawn from the lorry or conveyor belt can be regarded as being repre­sentative for the delivered fuel load. The moisture content, which is the main fue property to measure the value of the fuel, can show great variation within a single truckload. If the sample shows a different moisture content from that of the average of the truckload, the calculation of the energy content and thus the calculated price to be paid for the biofuel can be misleading.