Article(id=1217781126660276972, tenantId=1146029695717560320, journalId=1149652044408987649, issueId=1217779717386715826, articleNumber=null, orderNo=null, doi=10.19812/j.cnki.jfsq11-5956/ts.20250121009, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1737388800000, receivedDateStr=2025-01-21, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1768271245875, onlineDateStr=2026-01-13, pubDate=1750780800000, pubDateStr=2025-06-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1768271245875, onlineIssueDateStr=2026-01-13, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1768271245875, creator=13701087609, updateTime=1768271245875, updator=13701087609, issue=Issue{id=1217779717386715826, tenantId=1146029695717560320, journalId=1149652044408987649, year='2025', volume='16', issue='12', pageStart='1', pageEnd='320', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1768270909877, creator=13701087609, updateTime=1768299620707, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1217900139386163208, tenantId=1146029695717560320, journalId=1149652044408987649, issueId=1217779717386715826, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1217900139386163209, tenantId=1146029695717560320, journalId=1149652044408987649, issueId=1217779717386715826, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=238, endPage=244, ext={EN=ArticleExt(id=1217781127075513089, articleId=1217781126660276972, tenantId=1146029695717560320, journalId=1149652044408987649, language=EN, title=Application of low-field nuclear magnetic resonance 2D fingerprint spectroscopy technology in rapid quality detection of pork floss products, columnId=1151895321388347923, journalTitle=Journal of Food Safety & Quality, columnName=Food Analysis and Detection, runingTitle=null, highlight=null, articleAbstract=

Objective To achieve the identification and rapid detection of commonly found types of meat floss on the market via low-field nuclear magnetic resonance. Methods This study developed a low-field nuclear magnetic resonance two-dimensional relaxation fingerprinting technique suitable for the rapid detection of meat floss product types. Based on the colour discrepancy, different types of meat floss products can be distinguished. Results The developed two-dimensional relaxation fingerprinting technique can quickly and non-destructively distinguish between commonly available pork, chicken, beef, fish, and their mixed meat floss products.With the change in the proportion of different components in meat floss, the fingerprint spectrum shows a significant qualitative trend, effectively reflecting the changes in the proportion of various meats in meat floss, which proves the accuracy of this technology. Conclusion This research method can rapidly, non-destructively and accurately differentiate most types of meat floss on the market, meeting the needs of the food industry and government testing institutions, making it a promising new detection tool with great potential.

, correspAuthors=Xue-Lu WANG, Ye-Feng YAO, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, authorCompany=null, fund=null, authors=null, authorsList=Yi-Qian HU, Cheng XU, Tao HU, Xi-Yun ZHOU, Wen-Tao HU, Xue-Lu WANG, Ye-Feng YAO), CN=ArticleExt(id=1217781129269134204, articleId=1217781126660276972, tenantId=1146029695717560320, journalId=1149652044408987649, language=CN, title=低场核磁共振二维指纹谱技术在肉松种类快速检测中的应用研究, columnId=1151895321958773274, journalTitle=食品安全质量检测学报, columnName=食品分析与检测, runingTitle=null, highlight=null, articleAbstract=

目的 利用低场核磁共振技术实现对市面上常见肉松种类的快速无损检测与识别。方法 本研究开发了一种适用于肉松制品种类快速检测的低场核磁共振二维弛豫指纹谱方法, 基于指纹谱色度差异区分肉松种类。结果 基于研发的二维弛豫指纹谱技术方法, 可对市面上常见的猪肉、鸡肉、牛肉、鱼肉及其混合肉松进行快速无损区分。随着肉松中不同成分比例的变化, 指纹谱展现出明显的定性变化趋势, 能够有效反映肉松中各类肉类的比例变化, 证实了该技术的精确性。结论 本研究方法可以快速无损并精确地区分市面上大部分肉松种类, 能够满足食品行业和政府检测机构的需求, 是一种具有巨大前景的新型检测手段。

, correspAuthors=王雪璐, 姚叶锋, authorNote=null, correspAuthorsNote=
*王雪璐(1988—), 女, 博士, 教授, 主要研究方向为新型原位核磁共振技术研发领域的研究。E-mail: ;
姚叶锋(1976—), 男, 博士, 研究员, 主要研究方向为核磁共振系统和方法的研发与应用。E-mail:
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胡艺骞(2003—), 男, 主要研究方向为凝聚态物理。E-mail:

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Shanghai: East China Normal University, 2022., articleTitle=null, refAbstract=null), Reference(id=1217899576166630197, tenantId=1146029695717560320, journalId=1149652044408987649, articleId=1217781126660276972, doi=null, pmid=null, pmcid=null, year=2020, volume=18, issue=4, pageStart=505, pageEnd=511, url=null, language=null, rfNumber=[30], rfOrder=52, authorNames=李毅, 辛家祥, 朱晶, journalName=生物加工过程, refType=null, unstructuredReference=李毅, 辛家祥, 朱晶, 等. 核磁共振指纹谱技术在掺杂食用油检测上的应用[J]. 生物加工过程, 2020, 18(4): 505-511, articleTitle=核磁共振指纹谱技术在掺杂食用油检测上的应用, refAbstract=null), Reference(id=1217899576225350454, tenantId=1146029695717560320, journalId=1149652044408987649, articleId=1217781126660276972, doi=null, pmid=null, pmcid=null, year=2020, volume=18, issue=4, pageStart=505, pageEnd=511, url=null, language=null, rfNumber=[30], rfOrder=53, authorNames=LI Y, XIN JX, ZHU J, journalName=Bioprocessing Process, refType=null, unstructuredReference=LI Y, XIN JX, ZHU J, et al. 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注: a. 4种肉松T1弛豫曲线; b. 4种肉松T2弛豫曲线。

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低场核磁共振二维指纹谱技术在肉松种类快速检测中的应用研究
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胡艺骞 1 , 徐成 1 , 胡涛 1 , 周希韵 1 , 胡文涛 2 , 王雪璐 1, 3, * , 姚叶锋 1, 3, *
食品安全质量检测学报 | 食品分析与检测 2025,16(12): 238-244
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食品安全质量检测学报 | 食品分析与检测 2025, 16(12): 238-244
低场核磁共振二维指纹谱技术在肉松种类快速检测中的应用研究
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胡艺骞1 , 徐成1, 胡涛1, 周希韵1, 胡文涛2, 王雪璐1, 3, * , 姚叶锋1, 3, *
作者信息
  • 1 上海市磁共振重点实验室, 华东师范大学物理与电子科学学院, 上海 200062
  • 2 苏州市食品检验检测中心, 苏州 215104
  • 3 华东师范大学医学磁共振与分子影像技术研究院, 上海 200062
  • 胡艺骞(2003—), 男, 主要研究方向为凝聚态物理。E-mail:

通讯作者:

*王雪璐(1988—), 女, 博士, 教授, 主要研究方向为新型原位核磁共振技术研发领域的研究。E-mail: ;
姚叶锋(1976—), 男, 博士, 研究员, 主要研究方向为核磁共振系统和方法的研发与应用。E-mail:
Application of low-field nuclear magnetic resonance 2D fingerprint spectroscopy technology in rapid quality detection of pork floss products
Yi-Qian HU1 , Cheng XU1, Tao HU1, Xi-Yun ZHOU1, Wen-Tao HU2, Xue-Lu WANG1, 3, * , Ye-Feng YAO1, 3, *
Affiliations
  • 1 Shanghai Key Laboratory of Magnetic Resonance, College of Physics and Electronic Science, East China Normal University, Shanghai 200062, China
  • 2 Suzhou Institute for Food Control, Suzhou 215104, China
  • 3 Institute of Magnetic Resonance and Molecular Imaging in Medicine, East China Normal University, Shanghai 200062, China
出版时间: 2025-06-25 doi: 10.19812/j.cnki.jfsq11-5956/ts.20250121009
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目的 利用低场核磁共振技术实现对市面上常见肉松种类的快速无损检测与识别。方法 本研究开发了一种适用于肉松制品种类快速检测的低场核磁共振二维弛豫指纹谱方法, 基于指纹谱色度差异区分肉松种类。结果 基于研发的二维弛豫指纹谱技术方法, 可对市面上常见的猪肉、鸡肉、牛肉、鱼肉及其混合肉松进行快速无损区分。随着肉松中不同成分比例的变化, 指纹谱展现出明显的定性变化趋势, 能够有效反映肉松中各类肉类的比例变化, 证实了该技术的精确性。结论 本研究方法可以快速无损并精确地区分市面上大部分肉松种类, 能够满足食品行业和政府检测机构的需求, 是一种具有巨大前景的新型检测手段。

低场核磁共振  /  肉松制品  /  核磁共振指纹谱  /  食品安全

Objective To achieve the identification and rapid detection of commonly found types of meat floss on the market via low-field nuclear magnetic resonance. Methods This study developed a low-field nuclear magnetic resonance two-dimensional relaxation fingerprinting technique suitable for the rapid detection of meat floss product types. Based on the colour discrepancy, different types of meat floss products can be distinguished. Results The developed two-dimensional relaxation fingerprinting technique can quickly and non-destructively distinguish between commonly available pork, chicken, beef, fish, and their mixed meat floss products.With the change in the proportion of different components in meat floss, the fingerprint spectrum shows a significant qualitative trend, effectively reflecting the changes in the proportion of various meats in meat floss, which proves the accuracy of this technology. Conclusion This research method can rapidly, non-destructively and accurately differentiate most types of meat floss on the market, meeting the needs of the food industry and government testing institutions, making it a promising new detection tool with great potential.

low-field nuclear magnetic resonance  /  meat floss product  /  nuclear magnetic resonance fingerprint spectroscopy  /  food safety
胡艺骞, 徐成, 胡涛, 周希韵, 胡文涛, 王雪璐, 姚叶锋. 低场核磁共振二维指纹谱技术在肉松种类快速检测中的应用研究. 食品安全质量检测学报, 2025 , 16 (12) : 238 -244 . DOI: 10.19812/j.cnki.jfsq11-5956/ts.20250121009
Yi-Qian HU, Cheng XU, Tao HU, Xi-Yun ZHOU, Wen-Tao HU, Xue-Lu WANG, Ye-Feng YAO. Application of low-field nuclear magnetic resonance 2D fingerprint spectroscopy technology in rapid quality detection of pork floss products[J]. Journal of Food Safety & Quality, 2025 , 16 (12) : 238 -244 . DOI: 10.19812/j.cnki.jfsq11-5956/ts.20250121009
中国是世界肉类生产和消费大国, 肉制品在整体肉类产量中的占比逐年提升, 过去30年经历了产量的快速增长。目前, 肉制品行业正处于转型升级的过度时期, 寻求新的增长点, 有望保持稳定的增长趋势[1]。肉松作为我国特有的传统肉干制品之一, 具有强大的市场活力[2]。肉松的品质主要取决于原料肉、加工工艺及贮藏方式。其中, 原料肉的种类及品质质量均会对肉松品质产生影响[3-4]。综合分析肉制品的质量问题主要有以下两种: 第一, 向价格品质相对较高的肉制品中掺入价格品质相对较低的其他肉质原料或者植物蛋白; 第二, 将品质只能达到低等级的肉制品宣称为高等级的肉制品。面对这些问题, 目前主要检测手段包括分子生物学技术、光谱技术、色谱质谱技术、免疫学检测、代谢组学技术等[5]。其中最为常见的是分子生物学技术[6-7]和光谱技术[8-10]。对于上述肉制品质量问题的第一种情形, 主要采用分子生物学技术中的主成分分析(principal component analysis, PCR)方法进行鉴定[11-12]。该方法虽然灵敏度高, 但检测成本较高, 并且在定量方面存在一定的局限性。如果目标源性成分未在筛查范围内, 可能会导致漏判。此外, 还可以使用红外光谱和拉曼光谱[13-14]对植物蛋白和动物蛋白进行分析和鉴别, 但这类光谱存在重叠现象, 较为复杂, 因此需要结合统计学方法进行辅助分析。对于第二种情况, 根据GB/T 23968—2022《肉松质量通则》, 需要使用大量试剂分别检测淀粉、脂肪、蛋白质等成分的含量。上述常见检测手段步骤烦琐、检测周期长, 并且会破坏原有样品。因此, 为了应对日益增长的肉制品检测需求, 开发一种新型快速检测技术以辨别肉松的种类及品质具有重要意义。
低场核磁共振(low field-nuclear magnetic resonance, LF-NMR)指纹谱技术是近几年来逐渐兴起的新技术之一, 并最先在医学领域得到应用, 用于监测人体组织的变化[15-16]。该技术通过使用专门设计的核磁共振弛豫指纹谱脉冲序列, 同步测量样品的纵向弛豫(T1)和横向弛豫(T2)信息的二维弛豫信号, 从而得到与样品本质属性相关的二维弛豫谱。其核心优势在于能够监测并放大受多变量影响的核磁共振信号, 即样品的整体弛豫特征。这种通过弛豫谱技术获得的弛豫特征具有高度独特性, 有望成为样品的自有特征, 用于区分其他类似样品。在食品领域, 该技术[17-18]也已经在食用油[19-21]、白酒[22]、生兽肉[23-25]等食品的检测中发挥巨大作用。杜蘅等[26]尝试使用低场核磁指纹谱技术通过观测食用油中H1T1T2弛豫信号差异, 并结合主成分分析方法(principal component analysis, PCA)对食用油种类和食用油掺伪情况进行区分和判断。国外也存在利用食用油中H1T1T2弛豫信号分析食用油中脂肪酸成分[27]和研究初榨橄榄油最佳储存方案的案例[28]。然而, 使用二维LF-NMR指纹谱技术对肉松制品种类进行快速检测识别的研究报告还鲜见报道。
本研究旨在探索适用于肉松制品快速检测的二维LF-NMR弛豫指纹谱技术方法, 并将其应用于肉松种类及品质检测领域[29-31]。利用该方法, 通过对市面上常见肉松(包括鸡肉松、牛肉送、猪肉松和鱼肉松)进行系统研究, 尝试建立三维坐标系置信区间, 以期为后续的鉴别工作提供参考依据, 并在肉类及肉制品质量安全筛查中得到广泛应用。
猪、鸡、牛、鱼4种肉松均于市场中采购。核磁管(北京欣维尔玻璃仪器有限公司)。
VTMR20-010V-I低场核磁共振仪[磁场强度为(0.5±0.05) T, 苏州纽迈分析仪器股份有限公司]; FPS20弛豫指纹谱系统(用于肉制品T1、T2弛豫测量以及弛豫指纹谱数据采集, 苏州纽迈分析仪器股份有限公司); ATX224电子天平(精度0.1 mg, 日本岛津公司)。
对于每个肉制品样品: 取1 g放入10 mm核磁管中, 将肉压缩至1 cm处, 充分预热后放入低场核磁共振仪进行实验。
肉松T1弛豫谱测量方法: 采样反转恢复(inversion recovery, IR)序列。实验参数: 频率偏置: 13000 Hz, 采样点数: 1 024, 累加次数: 4次, 90°脉冲脉宽: 2.96 μs, 180°脉冲脉宽: 4.80 μs, 谱宽: 333.333 kHz, 等待时间: 2 s, 反转时间个数: 40。
肉松T2弛豫谱测量方法: 采样序列 (carr-purcell- meiboom-gill, CPMG)。实验参数: 频率偏置: 13000 Hz, 采样点数: 1024, 累加次数: 4次, 90°脉冲脉宽: 2.96 μs, 180°脉冲脉宽: 4.80 μs, 谱宽: 333.333 kHz, 等待时间: 2 s, 回波时间: 0.2 ms, 回波个数: 3000。
肉松弛豫指纹谱数据采集方法: 采样核磁共振弛豫指纹谱脉冲序列。实验参数: τ1代表弛豫时间, 实验中选取为100、150、200、250、300、400、500 μs, n代表重复次数, 实验中选取了1~2500之间18个值, 即[3、5、10、20、40、80、100、150、200、250、300、400、500、700、900、1200、1500、2500], τ2代表一固定弛豫时间, 为100 μs。频率偏置: 1260 Hz, 采样点数: 1024, 累加次数: 40次, 90°脉冲脉宽: 2.8 μs, 180°脉冲脉宽: 5.2 μs, 谱宽: 100 kHz, 等待时间: 2 s。本研究使用这些已经确定的参数进行所有后续实验。
采用FPS20弛豫指纹谱系统生成二维指纹谱, 采用Origin 2024版本软件绘制三维坐标系图。
由此获得肉制品的二维弛豫曲面f(τ1,n), 归一化后为fn(τ1,n)。
以四类肉松样品的二维弛豫数据平均强度生成本文中的参考曲面 fref(x,y)。
其曲面函数为: fref(x,y)=18.54-17.11x-6.667y+6.41x2+4.15xy+0.3606y2-1.232x3-1.024x2y-0.08823xy2+0.04467y3+0.1212x4+ 0.1138x3y+0.02533x2y2-0.02851xy3+0.003422y4-0.00484x5-0.004637x4y-0.002608x3y2+0.001928x2y3+0.001074xy4+0.0000372y5
将实验所获得的二维弛豫曲面fn(τ1,n)与参考曲面fref(x,y)相减, 即可获得肉松τ2分布指纹谱。
本研究对市面上常见4类肉松(鸡肉松、牛肉送、猪肉松和鱼肉松)进行了一维T1和T2 LF-NMR弛豫曲线测量。弛豫时间曲线及数值分别如图1所示。可以看出, 这4种肉松的弛豫曲线虽然存在一定差异, 但整体上较为接近, 缺乏显著的区分度。因此, 仅凭样品的T1、T2弛豫曲线, 本研究很难快速且准确地判定不同种类的肉松。因此, 本研究需要寻找更为有效且具有更高区分度的方法来鉴别这4种肉松。
核磁共振指纹谱技术主要分为两个部分: 首先, 通过设计特定的核磁共振弛豫指纹谱脉冲序列对众多样品进行测试, 并通过特定的数据处理方法建立标准的平均参考数据库。其次, 将待测样品与这个标准参考数据库进行比较, 生成一系列指纹谱图, 并分析不同样品指纹谱图之间的差异。在指纹谱图中, 样品的差异会通过颜色的差异来显现。
为了评价方法的可靠性, 本研究对肉制品的稳定性进行了测试。本研究选取了鲜牛肉同一部位制备3个不同质量标样样品(样品1: 0.56 g; 样品2: 3.26 g; 样品3: 1.02 g), 保证温度一致的条件下, 每个样本进行3次重复实验, 累计获得9个数据点。对获得的9组核磁共振指纹谱数据进行分析显示(如图2所示), 在统一测试环境下, 不同质量样本的指纹谱特征参数具有较好一致性。也就是说, 在保证测试环境相同的情况下, 样品的数据具有一定的可靠性。
其次, 为探究水分含量对检测结果的影响, 本研究构建了水分梯度系列样本: 取1 g标准肉松样品, 分别添加0.2、0.4、0.8、1.0、1.2、1.5、2.0 mL去离子水(精确至±0.02 mL), 经均质化处理后封装于标准核磁管中进行测定。图3展示了不同含水量样本的指纹谱特征及三维参数空间分布。数据分析显示, 随水相体积增加(0.2~2.0 mL区间), 指纹谱呈现连续色度迁移现象, 其颜色沿红-蓝光谱轴产生梯度变化。在三维参数空间中, 数据点分布呈现两阶段位移特征: 当含水量在0.2~1.0 mL区间时, 位移向量与水分增量呈近似线性关系; 而在1.2~2.0 mL区间则表现出不同斜率特征。因此, 为了确保样品测量的稳定性, 需要严格控制样品的含水量。
随后, 为了得到差异性较大的实验参数, 本研究需要调整的两个参数分别是D0(两段采样序列间的等待时间/ms)和D3(反转信号回复时间/ms)。基于经验, 本研究保持D0=1500 ms不变, 以确保两段采样序列之间有足够的等待时间, 并调整D3的值来进行实验。本研究分别设定D3=1000、1100、200、300、400和500 ms, 并对4种肉松进行测量。结果表明, 当参数D0=1500, D3=200时, 这4种肉松的指纹谱相较于其他参数组合具有更高的区分度(如图4所示)。在这个参数设置下, 鸡肉松的指纹谱整体呈现浅绿色, 猪肉松呈现红色, 鱼肉松呈现浅蓝色, 而牛肉松则呈现蓝色, 且顶部颜色较深。本研究认为, 这一参数组合能够有效反映猪肉松、鸡肉松、牛肉松和鱼肉松之间的指纹谱差异。因此, 在后续实验中本研究选取参数D0=1500, D3=200。
本研究采购了市场上常见的猪肉松、鸡肉松、牛肉松和鱼肉松, 包括9个品牌的猪肉松、6个品牌的鸡肉松、5个品牌的牛肉松和5个品牌的鱼肉松, 总计25种样品。在预设的参数D0=1500和D3=200下, 将这些样品(每种样品取1 g装入核磁管)放入低场核磁仪器进行测量。
如1.4部分描述, 通过采用特定的数据处理方法, 本研究将每种肉松的检测数据点整合到三维坐标系中, 并在此基础上生成了置信度为60%的置信椭球(如图5所示), 3个维度分别为XYZ, 代表指纹谱中的3个特征区域。从三维坐标系的可视化图中可以清晰地看出, 不同种类的肉松样本数据点具有明显的分布特征。猪肉松的数据点主要集中在坐标系的上部左侧, 形成一个相对密集的区域; 鸡肉松的数据点则集中在坐标系的下部右侧, 明显分布在另一端。不同类型的牛肉松样本数据点分别分布在两侧: 一种牛肉松的数据点主要集中在左上角, 靠近猪肉松的区域, 而另一种牛肉松的数据点则位于右下角, 接近鸡肉松的区域。此外, 鱼肉松的数据点则位于右下角, 接近鸡肉松和一种牛肉松之间的区域。这些分布特征表明, 不同品种的肉松在三维坐标系中的位置差异较为明显, 具有较好的区分度。通过这样的分析, 本研究可以初步判定不同类型肉松之间存在可识别的区别, 从而为进一步的肉松分类和品质检测提供数据支持和理论依据。
除了对单独品种的肉松进行研究外, 本研究也尝试对混合肉松进行研究。本研究选取了市场上销量广泛且生产量较大的猪肉松和鸡肉松来进行混合肉松的检测。实验中, 本研究以1 g总肉松质量为基准, 选取了猪肉松品牌1和鸡肉松品牌1作为样品, 设置了猪鸡肉松的质量比例分别为1:9、2:8、3:7、4:6、5:5、6:4、7:3、8:2、9:1, 将这些样品分别装入核磁管并混合均匀后, 放入低场核磁共振仪器进行测量, 并得到了如下部分实验结果。
图6中可以看出, 混合肉松的弛豫指纹谱呈现出明显的变化。当猪肉松的比例较高时, 指纹谱的整体颜色趋向于猪肉松的典型红色, 这反映了猪肉松特有的物理和化学特性。随着猪肉松比例的逐渐降低和鸡肉松比例的不断增加, 指纹谱的颜色会由红色逐渐过渡为黄色, 最终转变为绿色, 并最终趋向于纯鸡肉松的蓝色。这种色彩变化正好与肉松中猪肉松和鸡肉松的相对含量变化相对应。通过对比混合肉松样品与纯肉松样品的弛豫指纹谱, 可以初步判断猪肉松中是否掺入了其他肉类, 尤其是鸡肉松。然而, 需要注意的是, 单纯依赖弛豫指纹谱分析, 虽然可以检测到混入了其他种类的肉松, 但仍然难以准确识别混合肉松中各成分的具体比例。为了进一步提高分析的精度, 本研究对这些样品进行了三维空间特征坐标系的绘制(如图7所示)。在三维坐标系中, 本研究通过最小二乘法拟合数据点, 观察到了不同混合比例下的数据点呈现出良好的线性关系, 决定系数R2=0.97186, 拟合效果较好。随着猪肉松占比的下降, 鸡肉松占比的上升, 数据点的分布逐渐从纯猪肉松的位置移动到纯鸡肉松的位置, 并且这些数据点始终保持在一条直线附近。通过这种三维空间坐标的分析方法, 本研究能够更精确地确定肉松样品中猪肉松和鸡肉松的比例, 进而有效识别肉制品中的混合情况。
本研究以市场上常见的肉松产品为对象, 开发了一套基于低场核磁共振技术的二维指纹谱分析方法。该方法能够有效区分猪肉松、鸡肉松、牛肉松和鱼肉松, 并且具有显著的区分能力, 尤其能够识别不同混合比例的肉松样本。随着肉松中不同成分比例的变化, 指纹谱展现出明显的定性变化趋势, 能够有效反映肉松中各类肉类的比例变化。总体而言, 本研究提出的方法操作直观、快速且简便, 具备高效性和高性价比, 为市场上的肉松产品检测提供了一种成本效益高的解决方案。同时, 该方法符合快速、准确、无损和环保的要求, 能够满足食品行业和政府检测机构的需求。预计该技术将在食品检测领域得到广泛应用, 并具有良好的发展前景。
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2025年第16卷第12期
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doi: 10.19812/j.cnki.jfsq11-5956/ts.20250121009
  • 接收时间:2025-01-21
  • 首发时间:2026-01-13
  • 出版时间:2025-06-25
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  • 收稿日期:2025-01-21
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    1 上海市磁共振重点实验室, 华东师范大学物理与电子科学学院, 上海 200062
    2 苏州市食品检验检测中心, 苏州 215104
    3 华东师范大学医学磁共振与分子影像技术研究院, 上海 200062

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*王雪璐(1988—), 女, 博士, 教授, 主要研究方向为新型原位核磁共振技术研发领域的研究。E-mail: ;
姚叶锋(1976—), 男, 博士, 研究员, 主要研究方向为核磁共振系统和方法的研发与应用。E-mail:
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2种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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