Stability Test of Colouring Agent from Pericarpium of Red Dragon Fruit (Hylocereus Polyrhizus) Extract in Laboratory Diagnostic of Intestinal Nematode Eggs Preparation

The red dragon fruit pericarpium contais anthocyanin as a natural red dye agent that can be extracted from plant cells. Anthocianin can be used as a colouring agent in intestinal nematode worm eggs. The aim of reseach is to determinate a stability test of natural red dye produced from 3% red dragon fruit pericarpium extract after storing for 27, 28, 29 weeks using a spectrophotometer at 504 nm wavelength and also to determine a stability test in diagnostic application in colouring of intestinal nematode worm eggs preparation. The result of the reseach indicated the longer the storage time, the lower the absorbance value obtained. Likewise with preparations, the longer the storage of these dyes the less the quality of the dye. The processing data used Anova test. From the result of the statistical test can be concluded that stability of the dye agent will be decrease according to lengh of time required. The suggestion for next result is to do resistance test for a long time accurately.