Unverified75% confidenceDecision RuleTime unknown
豆粒挑选看'脐色'：黄豆脐（种脐）呈黄白色或浅褐色为国产东北豆特征，脐色发黑或深褐多为进口豆或存放过久，脐色浅且粒径均匀（8mm左右）的蛋白质含量通常更高
1
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75%
Confidence
Long-term
Relevance
-
First Seen
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Unverified干黄豆选颗粒大小均匀、色泽金黄有光泽、脐色浅（乳白或黄白）的，脐色深褐或发黑多为陈豆，泡发率低、豆浆出浆率下降81% similarUnverified毛豆（青大豆）应选豆荚饱满、绒毛完整、色泽鲜绿的；荚壳发黄或有黑斑说明采摘过熟或存放过久，豆粒淀粉化、口感变粉且鲜甜味流失80% similarUnverified真黑豆掰开或用指甲刮豆皮，豆仁应为青色或黄色而非黑色；豆脐（种脐）呈白色。若豆仁也发黑，基本可判定为染色黑豆或黑芸豆冒充75% similarUnverified鉴别真黑豆看豆脐（种脐）颜色应为白色或黄白色，若种脐为黑色需警惕黑芸豆（黑肾豆）冒充；真黑豆用手搓外皮，泡水后掉色应为红褐色/紫红色（花青素），若掉色为墨黑色则可能是染色豆75% similarUnverified选新豆不选陈豆：新豆表皮有自然光泽、颜色鲜亮饱满，陈豆颜色发暗、表皮起皱、豆脐发黑，陈豆煮不烂且营养流失、可能有哈喇味74% similar
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