![]() ![]() The strongest correlations between μ a and SSC, and soluble sugars contents, were observed in the correlation of μ a with sucrose, with an r of 0.934. The correlations between μ a and SSC, and soluble sugars contents, showed increasing tendencies with increasing wavelengths, while for μ′ s, correlations had the opposite trend. In the whole wavelength range, both μ a and μ′ s were positively related to SSC and soluble sugars contents. The result showed that SSC, the content of total soluble sugars (TSS), fructose, glucose and sucrose were all decreasing after storage, and the same trend appeared in the change of μ a and μ′ s. Relationships between μ a, μ′ s and SSC, and soluble sugars contents, were investigated. In this research, absorption coefficient ( μ a) and reduced scattering coefficient ( μ′ s) of Fuji apple during storage were obtained using automatic integrating sphere (AIS) at 905–1650 nm. Evaluating the relationship between the optical properties and soluble sugars facilitates exploration of the mechanism of optical techniques in SSC assessment. Soluble solid content (SSC) is regarded as the most significant internal quality associated with the taste and maturity in fruits. ![]()
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