Date of Completion


Document Type

Research Project

Degree Name

Grade 12


Water spinach, lead, cadmium, bioaccumulation, supermarkets, public markets, Ipomoea aquatica


The study entitled “A Comparative Analysis of Lead and Cadmium Contents in Ipomoea aquatica (Water Spinach) Sold at the Selected Public Markets and Supermarkets in Dasmariñas, Cavite” aimed to test the lead and cadmium content in water spinach obtained in public markets and supermarkets. The study focused on water spinach because it has the capability to bioaccumulate which means that the substances it absorbs accumulate inside itself at a faster rate that it can excrete it. The samples were tested using Inductively Coupled Plasma Atomic Emission Spectroscopy, a procedure that specifically identifies the concentration of heavy metals in a sample. The results from the laboratories showed that all the samples were discovered to have less than 0.025 ppm for both lead and cadmium which is still below both the limits of lead and cadmium in food set by the World Health Organization. Moreover, it was found that there are no significant difference between the samples obtained in both markets regarding their lead and cadmium concentrations. In conclusion since the lead and cadmium contaminants accumulated by the samples are less than the limit set by the WHO, the water spinach in the selected public markets and super markets are safe for consumption.

First Advisor

Mark Lawrence F. Fabregas