An Electric-Field-Based Detection System for Metallic Contaminants in Powdered Food
Abstract
Metallic contaminants in powdered foods represent a serious safety concern. Therefore, effective detection is crucial for food safety. This study aimed to develop an electric-field-based detection system and quantitatively evaluate its performance. An alternating (+/−) electrode array (gap 1–2 mm) was designed, and resonance analysis identified 15 kHz with a 2 mm gap as the optimal operating condition. Using an IGBT-based high-voltage source, 1.35 kV was selected to ensure stable operation without partial discharge. A real-time algorithm based on a minimum current-change threshold was implemented, and detection responses to stainless steel (SUS), aluminum (Al), and copper (Cu) particles in three size classes (
Fields of Study & Subjects
Non-Destructive Testing Techniques
Spectroscopy and Chemometric Analyses
Electrical and Bioimpedance Tomography
Publication details
- Journal / source
- Processes
- Volume
- 14
- Issue
- 6
- Pages
- 922–922
- Publication date
- 13 March 2026
- Language
- EN