Inductively Coupled Plasma Optical Electro Spectroscopic Characterisation of Some Indigenous Nigerian Leafy Vegetables as Prospective Mineral Sources In Human Diets

Abstract

Minerals are nutrients that are needed in macro and micro amounts to guarantee proper body function. They are obtaineable from plant and natural sources. There has been continuous change in climatic conditions and this has resulted to low yield, pest infestation, loss of farm land, and concomitant low income generated from vegetables that are consumed regularly. The regular cuisines are becoming scarce and expensive with many households not aware of possible sources of suitable substitute to complement and supplement mineral requirements. This study examined the mineral composition of some indigenous leafy vegetables that can be consumed by humans as an alternate source of mineral. Colocasia esculenta (red Cocoyam), Laportea aestuans (L) (Tropical nettle weed), Daucus carota L (Carrot leaves), Manihot esculenta, Crantz (Cassava leaves) and Sesamum indicum (Sesame leaves) were collected and authenticated. Inductively coupled Plasma-Optical Emission Spectrometry was used to analyse the mineral composition of each of the leaves. Microminerals like Boron, Copper, Iron, Manganese, Silicon, and Zinc were present in amount sufficient to fufill the daily required intake when 100 g of the plant was consumed. Macrominerals like Calcium, Magnesium, Potassium, and Sodium were also observed to be in quantities able to supply the recommended daily allowance on consumption of 100 g of the plant. The plants are rich in micro and macro minerals and therefore should be explored further as prospective sources of minerals for humans.