Scanning electron microscopy-energy dispersive X-ray spectrometer (SEM-EDX) detection of arsenic and cadmium in himematsutake mushroom

Abstract

The distribution of arsenic (As) and cadmium (Cd) in himematsutake was analyzed using scanning electron microscopy-energy dispersive X-ray spectrometer (SEM-EDX). The atomic percentage of the metals was confirmed by inductively coupled plasma-mass spectrometer (ICP-MS). Results show that the accumulation of As in pileus was higher than that in stipe by both SEM-EDX and ICP-MS analyses. The Cd level in pileus was higher than that in stipe by SEM-EDX analysis; whereas a higher level of Cd was found in stipe by ICP-MS analysis. Results of regression analysis showed that there was a positive correlation between the content of As and Cd in the piece samples by both SEM-EDX and ICP-MS methods. Results suggest that the SEM-EDX is one of the potential tools for rapid detection of metals, namely, As and Cd in himematsutake.
 
Key words: Arsenic (As), cadmium (Cd), scanning electron microscopy-energy dispersive X-ray spectrometer (SEM-EDX), coupled plasma-mass spectrometer (ICP-MS), himematsutake.