A measuring arrangement, in particular for spectroscopic measurements on particulate samples, is described, having a measuring cuvette (10) for sampling which has at least one window (11) through which the sample (3) can be irradiated and including a rotating mount (20) with which the measuring cuvette (10) can be rotated about a predetermined axis of rotation (1), whereby the alignment of the axis of rotation (1) deviates from a vertical reference direction.