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Q 碱性蓝6B指示剂具体怎么配制?

Question time:9/19/2019 2:42:23 PM

Describe:碱性蓝6B指示剂具体怎么配制?

A
1329219489@qq.com 2019-09-19 14:42
取碱性蓝1克,称准至0.01克,然后将他它加在50毫升煮沸的95%乙醇中,并在水浴中回流1小时,冷却后过滤。必要时,煮热的澄清滤液要用0.05%氢氧化钾乙醇溶液或0.05%盐酸溶液中和,直至加入1~2滴碱溶液能使指示剂溶液从蓝色变成浅红色而在冷却后又能恢复成蓝色

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