✍ Scribed by Paula Rodrigues; Helena Morais; Teresa Mota; Santos Olivera; Tibor Cserháti; Esther Forgács
No coin nor oath required. For personal study only.
Colour pigments of paprika powders of different origin were separated and quantitatively determined by reversed-phase high performance liquid chromatography. The standard deviations were included in the matrices of retention data and the matrices were evaluated by spectral mapping technique followed by two-dimensional nonlinear mapping. The resuls indicated that the distribution of paprika samples on the two-dimensional selectivity map is a better indicator of the origin of the samples, compared to what the potency values do, and the inclusion of the standard deviation of raw data may be employed as a useful tool to enhance the reliability of the authenticity test of paprika samples.
📜 SIMILAR VOLUMES
Standard deviation in sound power measurements made by the free field method (ISO 3745) is discussed. The authors numerically investigated the relationship between the standard deviation and the directivity characteristics of sound sources. The standard deviation of the sound power of sources as mea