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最近,我县在食品卫生大检查中,发现烟酒三部销售的黑木耳有掺假现象,我们对此进行了反复试验,查出木耳中掺入了农用化肥尿素。现将试验结果报告如下:方法与结果1.感官:本品质软,表面有少许白色结晶,手摄后有粘滑感。2.样品处理:取样品适量于锥形瓶中,加蒸馏水浸没样品,振摇10分钟,将提取液过滤.若有颜色,用活性碳脱色.3.方法:(1)游离氨检查:取滤液5毫升蒸干后,在直
Recently, my county in the food hygiene inspection, found that black and white fungus sold three cigarettes and tobacco adulteration phenomenon, we conducted a trial on this, found in the fungus mixed with agricultural fertilizer urea. The test results are reported as follows: Methods and Results 1. Sensory: The soft quality, the surface a little white crystals, sticky slippery feel after the hand. 2. Sample Processing: Take the appropriate amount of sample in a conical flask, add distilled water immersion samples, shake for 10 minutes, the extract was filtered.If the color, with activated carbon decolorization.3.Methods: (1) free ammonia check: take After the filtrate was evaporated to dryness 5 ml, straight