Magnetoelastic Resonance Detection of Calcium Oxalate Precipitation in Low Concentration Solutions

被引：3
作者：
Sisniega, Beatriz [1 ]
Gutierrez, Jon [1 ,2 ]
Garcia-Arribas, Alfredo [1 ,2 ]
机构：
[1] Univ Basque Country, Dept Elect & Elect, Euskal Herriko Unibertsitatea UPV EHU, Leioa 48940, Spain
[2] Basque Ctr Mat Applicat & Nanostruct, BC Mat, UPV EHU Sci Pk, Leioa 48490, Spain
来源：
IEEE TRANSACTIONS ON MAGNETICS | 2022年 / 58卷 / 02期
关键词：
Calcium oxalate precipitation; magnetoelastic resonance; mass sensor; resonance curve fit; CRYSTAL-STRUCTURE; SENSORS; FREQUENCY;
D O I：
10.1109/TMAG.2021.3103652
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A magnetoelastic resonance sensor of composition Fe73Cr5Si10B12 is used to monitor the precipitation reaction of calcium oxalate (CaC2O4) by measuring the changes in its resonance frequency, caused by the mass increase on its surface, during the precipitation process. Numerical fittings of the resonance curves were performed in order to improve the detection resolution. With respect to previous works on the monitoring of this precipitation reaction, this work explores the limit of detection of the technique, and the ability of the numerical fittings to improve the quality of the signals measured and the parameters that are extracted from them. For this purpose, the monitoring of the precipitation reactions when using reagents (oxalic acid and calcium chloride) of concentrations 1, 3, 5, and 10 mM were studied. The results show that the sensor is capable of tracking the precipitation reaction of solutions of concentration as low as 1 mM (the solubility limit of calcium oxalate is about 0.1 mM), with the sensor being able to resolve a mass of precipitate of 2 mu g.
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页数：5
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