Methods:To substitute "the trinitrophenol test paper" into" the trinitrophenol test paper wetted by sodium carbonate test solution" on the method of identification.
方法:将原法中“三酚试”改为“碳酸钠试液湿润过的三酚试”。
Methods:To substitute "the trinitrophenol test paper" into" the trinitrophenol test paper wetted by sodium carbonate test solution" on the method of identification.
方法:将原法中“三酚试”改为“碳酸钠试液湿润过的三酚试”。
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