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食盐:选购食盐可从三方面鉴定其质量;一看色泽,优质盐应为白色,质次的呈红色、黄色或黑色。二看结晶。纯净的盐结晶为六面体,含杂质多的盐为多面或不规则的结晶,凡晶粒较大,整齐而规则的质佳。三尝咸味,纯净的盐应有正常的咸味,而含有钙、镁等水溶性杂质时,咸味稍带苦涩,含泥沙杂质时有牙碜的感觉。由于食盐吸湿性高,周围环境中湿度超过70％时便会潮解,盐放久了会变得湿漉漉的。若要
Salt: Salt purchase can be identified from three aspects of its quality; a look at the color, high-quality salt should be white, qualitative times were red, yellow or black. Second look crystallization. Pure salt crystals for the hexahedron, containing impurities and more salt for the multi-faceted or irregular crystallization, where larger grains, neat and regular good quality. Three taste salty, pure salt should be normal salty, and contains calcium, magnesium and other water-soluble impurities, the salty taste a bit bitter, sandy sediment with tartar feeling. Due to the high hygroscopicity of the salt, when the humidity in the surrounding area exceeds 70%, it will deliquesce and the salt will become wet after a long time. To