如何鉴别黑米的真伪？

用手搓:用手搓大米，看看手上有没有染料。如果有黑色染料，就是假米。

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鼻闻:正宗黑米用温水浸泡后有天然的米香味，染色米有异味。

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看颜色:正宗的黑米皮有光泽，颜色深且浅，而染色的黑米无光泽，颜色一致。

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看表皮:正宗黑米的表皮呈片状，有指甲。如果是粉状的，就是劣质黑米。

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看米心:正宗黑米的米心是白色的。普通大米的米心是透明无色的。染色黑米如果用普通大米染色，染料的颜色会渗入米心，变成黑色。

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看泡饭水:正宗黑米的泡饭水是紫红色的，稀释后也是紫红色或微红。如果泡出来的水像墨水一样稀释后还是黑色的，那一定是假米。

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加白醋:黑米水遇碱会变绿，遇酸会变红。正宗的黑米水遇到酸会立刻变红。将一些黑米随机放入杯中，将白醋倒入杯中，充分搅拌。过一会儿，白醋变红成真黑米，变黑成假黑米。少量的红黑米是提取花青素后再染黑造成的。

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黑米是一种药食两用的大米，属于糯米。黑米是禾本科水稻长期栽培形成的特色品种。籽粒类型有籼稻和粳稻两种，籽粒品质分为糯性和非糯性。糙米是黑色或深棕色的。

黑米色泽黝黑，营养丰富，有“黑珍珠”、“世界米中之王”的美誉。我国很多地方都产，如陕西黑米、贵州黑糯米、湖南黑米等。食用价值高，除了煮粥，还可以做各种营养食品，酿酒。