phenolphthalein 

  1. 名詞
不可數名詞: (測試鹼性的試劑)酚酞, 苯酚酞

    
                        
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例句

                

                    
    
                                                    
  1. 
                                The remaining alkali is filtrated against standard acid using phenolphthalein as indicator.                            
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  2. 
                                Phenolphthalein , commonly used as a pH indicator, turns pink in the presence of a base such as ammonia fumes or sodium carbonate.                            
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  3. 
                                Developer fluids may be applied using a spray bottle, but some developers are in the form of vaporous, e.g. ammonia fumes used to develop phenolphthalein ink.                            
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  4. 
                                The pH meter or colormetric pH indicator (e.g., phenolphthalein ) must be capable of determining the acidity of liquid within 0.1 pH units. (i) Sonication Device.                            
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  5. 
                                One method of testing a structure for carbonatation is to drill a fresh hole in the surface and then treat the cut surface with phenolphthalein indicator solution.                            
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