no large replicate variance is seen

no large replicate variance is seen. Hence, one replicate may be enough if the instrument is mounted above a conveyor belt. It should also be noted that the validation approach used in the current study, i.e. leave-one-out cross validation, often is regarded as an optimistic approach. Thus, for industrial applications additional data, based on independent test sets, should be added. However, in the present feasibility study, the validation approaches could be regarded as sufficient.