The Butterfly PeaFloweras apH Indicator

摘要

Clitoria ternatea,or butterfly pea, is an easily accessible Asian flowerthat can function as apH indicator. A method of preparing the butterfly peaflowerindicator is described, then a pH color scalebetweenpH2 and 12 is shown. The indicator isstored over 8 days and testedto determine its reliability over time. It is concluded that the indicator solution has an effectiveshelf life of less than 5days. Amethod for creating pH paper is then describedand itspH colorscaleis shown.The change in the pH color scale is shown while storing the pH paper at room temperature and under refrigeration over a period of 10 days.It is found that storing pH paper in arefrigerator extends its reliability.