Measurement of metallic contaminants in food with a high-Tc SQUID

Tanaka, Saburo and Hatsukade, Yoshimi and Aspanut, Zarina and Matsuda, Takemasa and Hotta, Naoki and Uchida, M. and Natsume, Miyuki (2004) Measurement of metallic contaminants in food with a high-Tc SQUID. Superconductor Science and Technology, 17 (4). p. 620. ISSN 0953-2048,

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We have proposed and demonstrated a high-Tc SQUID system for detecting metallic contaminants in foodstuffs. There is a demand for the development of systems for detecting not only magnetic materials but also non-magnetic materials such as Cu and aluminium in foodstuffs to ensure food safety. The system consists of a SQUID magnetometer, an excitation coil and a permanent magnet. For a non-magnetic sample, an AC magnetic field is applied during detection to induce an eddy current in the sample. For a magnetizable sample, a strong magnetic field is applied to the sample prior to the detection attempt. We were able to detect a stainless steel ball with a diameter of 0.1 mm and a Cu ball less than 1 mm in diameter, for example.

Item Type: Article
Additional Information: Department of Physics, Faculty of Science Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA
Uncontrolled Keywords: high-Tc SQUID system; metallic contaminants; food safety; SQUID magnetometer
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Department of Physics
Depositing User: Miss Malisa Diana
Date Deposited: 17 Jul 2013 06:22
Last Modified: 12 Dec 2014 06:16

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