Unverified85% confidenceDecision RuleTime unknown
优质茯苓断面应为纯白至类白色，颜色发黄或有灰褐色斑点说明存放过久或受潮霉变，颜色异常洁白发亮则需警惕硫磺熏制
1
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85%
Confidence
Long-term
Relevance
-
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Unverified当归越白越漂亮越可能硫熏或漂白，天然当归切片颜色应为黄白偏微黄、略带油润感，颜色不均、边缘发暗才是正常干燥表现89% similarUnverified颜色异常洁白、切片均匀无斑点的百合片大概率经过硫磺熏蒸，正常无硫百合应呈微黄或淡黄褐色、边缘略有褐斑，泡水后无刺鼻酸味88% similarUnverified颜色越白越好看，但过度洁白往往是硫磺熏制或漂白结果；天然干百合略带黄褐边缘属正常氧化，不影响食用86% similarUnverified硫磺熏制的百合颜色异常洁白发亮、有刺鼻酸味，泡水后水色偏黄；天然干百合呈乳白或淡黄色、微有百合清香，选购时优先闻味道再看色泽86% similarUnverified选购干海带看表面白霜：适量白色粉末是甘露醇（天然甜味物质）属正常，但发黄、发红或有霉斑是变质，色泽应为墨绿至深褐、叶片完整不碎85% similar
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