Unverified85% confidenceDecision RuleTime unknown
合欢花采收后阴干为佳，烘干温度过高会破坏挥发油和黄酮，导致香气流失、颜色发暗。优选浅黄绿色、绒丝完整、有淡清香的阴干货
1
Sources
85%
Confidence
Long-term
Relevance
-
First Seen
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Unverified低温阴干或40-50℃烘干的茵陈能保留挥发油和绿原酸，颜色灰绿、香气足；高温暴晒或炒制的成品发黄褐、香气散失，利胆退黄成分损耗明显86% similarUnverified颜色异常鲜绿或发亮的南瓜籽仁可能经过染色或油炸处理，天然籽仁应为墨绿偏暗、表面哑光；开袋后有明显哈喇味（油脂酸败）的不可食用79% similarUnverified香气浓郁度与色泽保留度存在矛盾：干燥温度越高香味物质释放越充分但花青素、色素损失越大，颜色越暗；追求「颜值」的冷加工产品往往香味淡，需按用途取舍79% similarUnverified天然色素中甜菜红、花青素类不耐热且遇碱变色，超过80℃或pH偏碱会褪色发灰，需在烘焙后期或表面装饰使用；姜黄（黄）、栀子（蓝黄）耐热性较好78% similarUnverified菊花颜色异常鲜亮统一、发白或带绿荧光感需警惕硫磺熏制，正常晒制/烘干的菊花偏自然黄褐、花瓣略有卷曲；闻起来有刺鼻酸味的不要买78% similar
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