Unverified80% confidenceCautionTime unknown
桂圆肉（龙眼肉）成品颜色越深红发亮≠越好，正常干制应为黄褐至棕褐色；异常鲜亮的深红或均匀艳红需警惕硫磺熏制或糖水浸泡，可闻是否有刺鼻酸味
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80%
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Long-term
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Unverified颜色异常红亮发光的卤猪蹄慎买，可能过量使用色素或糖色，正常卤制应为自然的酱红/褐红色，表面油亮但不刺眼85% similarUnverified优质桂圆肉呈半透明琥珀色或深棕，颜色过于金黄鲜亮需警惕硫磺熏制；可闻是否有刺鼻酸味判断二氧化硫残留85% similarUnverified警惕硫熏桂圆：正常桂圆肉呈自然黄褐色至深棕色，硫熏处理的颜色异常鲜亮偏浅黄、有刺鼻酸味；抓一把闻若有明显酸涩化学味应放弃84% similarUnverified警惕颜色过于鲜艳红亮、表皮油光发亮的枣，可能经过打蜡或熏硫处理；天然干枣颜色为暗红或深枣红，表皮有自然褶皱，闻起来是枣香而非刺鼻酸味84% similarUnverified选购时注意辨别硫磺熏蒸：正常中宁枸杞颜色暗红偏紫，过于鲜艳均匀的亮红色可能经硫磺或色素处理；可闻是否有刺鼻酸味83% similar
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