DETERMINATION OF MINERAL ELEMENTS, HEAVY METALS INCLUDING MINERAL AND MOLAR RATIOS IN FRESH AND CANNED CALOCYBE INDICA (MILKY MUSHROOM)

Abstract

This study was conducted to evaluate the mineral composition of canned oyster mushroom stored for different storage period. The mushroom was purchased, processed and canned using the method. The mineral composition of the Calocybe indica mushroom was determined using the standard methods. The result of the mineral composition of the canned Calocybe indica showed that the zinc, sodium, potassium and calcium varied from 0.09 to 0.40, 0.01 to 11.60, 2.17 to 8.68, 0.04 to 0.40 and 0.02 to 1.40 respectively. Heavy metals of lead, nickel, copper and chromium varied from 0.00 to 0.01, 0.00, 0.00 to 0.03 and 0.02 to 0.03 respectively while mineral/anti-nutrient molar ratio of phy/ca,  phy/zn,, phy/fe and phyxca/zn varied from 0.0005 to 0.2667, 0.2131 to 0.5500, 0.1830 to 2.6667 and 0.0003to 4.9678 respectively. Results from this study have showed that each of the canned C. indica mushroom samples investigated were rich in mineral content excluding zinc. However, all the mineral content was observed to significantly increase after canning and during the storage period. The mineral molar ratio also revealed no clear progression.