Near-infrared (NIR) spectroscopy in diffuse reflectance mode was explored with the objective of discriminating seasalts according to their quality type (traditional salt vs “flower of salt”) and geographical origin (Atlantic vs Mediterranean). Sea saltswere also analyzed in terms of Ca2+, Mg2+, K+, alkalinity, and sulfate concentrations to support spectroscopic results. Highconcentrations of Mg2+ and K+ characterized Atlantic samples, while a high Ca2+ content was observed in traditional sea salts. Apartial least-squares discriminant analysis model considering the 8500 7500 cm 1 region permitted the discrimination of salts byquality types. The regions 4650 4350 and 5900 5500 cm 1 allowed salts classification according to their geographical origin. Itwas possible to classify correctly 85.3 and 94.8% of the analyzed samples according to the salt type and to the geographical origin,respectively. These results demonstrated that NIR spectroscopy is a suitable and very efficient tool for sea salt quality evaluation.
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机译：探索了漫反射模式下的近红外（NIR）光谱，目的是根据海盐的质量类型（传统盐与“盐花”）和地理来源（大西洋与地中海）来区分海盐。还根据Ca2 +，Mg2 +，K +，碱度和硫酸盐浓度对海盐进行了分析，以支持光谱结果。 Mg2 +和K +的高浓度是大西洋样品的特征，而传统海盐中的Ca2 +含量较高。考虑8500 7500 cm 1区域的偏最小二乘判别分析模型可以区分盐质量类型。 4650 4350和5900 5500 cm 1区域允许根据其地理来源对盐进行分类。可以分别根据盐的类型和地理来源对85.3％和94.8％的分析样品进行正确分类。这些结果表明，NIR光谱法是评估海盐质量的合适且非常有效的工具。
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