Quantitative Analysis and 2D/3D Elemental Imaging of Cocoa Beans Using X-ray Fluorescence Techniques

Area of Science:

• Agricultural Science
• Food Science
• Analytical Chemistry

Background:

• Cocoa beans (Theobroma cacao L.) are vital for the confectionery industry.
• Food safety regulations necessitate understanding contaminant levels and essential mineral content in cocoa.
• Previous research has not provided a comprehensive 3D elemental distribution analysis of intact cocoa beans.

Purpose of the Study:

• To present novel X-ray fluorescence (XRF) techniques for elemental bio-imaging of cocoa beans.
• To provide a detailed 3D-resolved elemental distribution map of intact cocoa beans.
• To enhance the understanding of essential mineral and toxic metal content for improved cocoa quality and safety.

Main Methods:

• Utilized three X-ray fluorescence (XRF) techniques for elemental bio-imaging of intact cocoa beans.
• Employed an additional XRF technique for quantitative analysis of cocoa bean pellets.
• Integrated multiple XRF methods to achieve a comprehensive elemental analysis.

Main Results:

• Successfully mapped the elemental composition and 3D distribution within intact cocoa beans.
• Identified the presence and location of both essential minerals and toxic metals.
• Provided the first detailed 3D-resolved elemental distribution data for complete cocoa beans.

Conclusions:

• The presented XRF techniques offer a powerful tool for analyzing elemental distribution in cocoa beans.
• Understanding elemental profiles is critical for meeting food safety standards and enhancing nutritional value.
• This research lays the groundwork for targeted strategies to improve cocoa bean quality and safety.