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ys407968112

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[求助] 比色皿怎么洗干净

大米米汤在整个比色皿表面留下一层淡淡的白色物质,常规方法和淀粉酶都洗不干净,怎么办?(米汤可以认为是大米粉碎溶解过滤之后的东西)
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ys407968112: 金币+5, ★有帮助 2013-09-26 09:32:31
试试如下方法
1、先将比色皿侵入含有少量阴离子表面活性剂的碳酸钠(20克/升)溶液泡洗,经水冲洗后,再于过氧化氢和硝酸(5:1)混合溶液中侵泡半小时。
2、在通风橱中用盐酸、水和甲醇(1:3:4)混合溶液泡洗,一般不超过10分钟。
2楼2013-09-24 14:10:24
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