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投稿时间：2021-07-23
投稿时间：2021-07-23
中文摘要: 利用同相等差感应电势法，向初级线圈施加5 V～20 V激励电压和300 Hz～500 Hz频率的激励参数，探究次级线圈中阿斯巴甜溶液的电学特性。结果发现，0～100 mg/kg阿斯巴甜溶液的瞬时绝对电压与初级线圈激励电压大小呈正相关，但不随频率变化而改变。20 V、300 Hz条件下，100 mg/kg阿斯巴甜溶液电势差较50 mg/kg提高32.46%，当阿斯巴甜质量分数增加时，体系电势差随激励电压增加而增大。阿斯巴甜质量分数、激励电压、频率及体系电势差呈线性相关，相关系数（r）为0.94。利用同相等差感应电势与化学法检测5种市售膨化食品中的阿斯巴甜总含量，其检测结果相对误差均在2.50%以内，同相等差感应电势法具有良好的重复性和准确性。将膨化食品预处理后的料液作为次级线圈，通过同相等差感应电势法测定其电信号特性来量化阿斯巴甜总含量，为膨化食品中阿斯巴甜的检测提供了一种新技术方法。
Abstract:In this study，5 V-20 V excitation voltage and 300 Hz-500 Hz excitation frequency were applied to a primary coil using the in-phase equal-difference induction potential method to analyze the electrical characteristics of aspartame solution in the secondary coil.The results showed that the instantaneous absolute voltage of 0-100 mg/kg aspartame solution positively correlated with the excitation voltage of the primary coil but did not change with the frequency.At 20 V and 300 Hz，the potential difference of 100 mg/kg aspartame solution was 32.46% higher than that of 50 mg/kg.When the mass fraction of aspartame increased，the potential difference of the system increased with increasing excitation voltage.The correlation coefficient（r）was 0.94，and the relative error was less than 2.50%.The method showed good repeatability and accuracy.The pretreated liquid of puffed food was used as the secondary coil，and its electrical signal characteristics were determined using the in-phase equal-difference induction potential method to quantify the total aspartame content.The proposed method is valuable for detecting aspartame in puffed food.
keywords: in-phase equal-difference induced potential method aspartame excitation voltage frequency puffed food
文章编号：202124023 中图分类号： 文献标志码：
基金项目:中国博士后科学基金项目（2020M682725）；国家自然科学基金面上项目（32172353）；江苏省优秀青年基金项目（BK20211582）
| 作者 | 单位 |
| 杨哪，周宇益，徐振林，孟嫚，陈新文，孙远明 | 广东利诚检测技术有限公司，广东 中山 528436；华南农业大学食品学院，广东 广州 510642；江南大学食品学院，江苏 无锡 214122；英都斯特（无锡）感应科技有限公司，江苏 无锡 214035 |
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