1.中国计量大学 光学与电子科技学院,浙江 杭州 310018
2.厦门大学 化学化工学院,福建 厦门 361005
3.厦门大学 材料学院,福建 厦门 361005
4.厦门大学第一附属医院,福建 厦门 361005
5.厦门大学 能源学院,福建 厦门 361005
6.嘉庚创新实验室,福建 厦门 361005
李志勇,主任技师,研究方向:医学检验新技术转化,E-mail:xmlzy_213@163.com
李剑锋,教授,研究方向:核壳纳米材料、表面增强拉曼光谱、电催化、热催化、光催化等能源反应及其原位谱学表征,公共安全、生命健康领域的拉曼快检,E-mail:Li@xmu.edu.cn
纸质出版日期:2024-01-15,
收稿日期:2023-09-14,
修回日期:2023-10-22,
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张铭中,关鹏程,林嘉盛等.基于内标型花瓣状间隙增强拉曼粒子的pH传感[J].分析测试学报,2024,43(01):207-212.
ZHANG Ming-zhong,GUAN Peng-cheng,LIN Jia-sheng,et al.pH Sensing Based on Internal Standard Petal-like Gap-enhanced Raman Particles[J].Journal of Instrumental Analysis,2024,43(01):207-212.
张铭中,关鹏程,林嘉盛等.基于内标型花瓣状间隙增强拉曼粒子的pH传感[J].分析测试学报,2024,43(01):207-212. DOI: 10.12452/j.fxcsxb.23091402.
ZHANG Ming-zhong,GUAN Peng-cheng,LIN Jia-sheng,et al.pH Sensing Based on Internal Standard Petal-like Gap-enhanced Raman Particles[J].Journal of Instrumental Analysis,2024,43(01):207-212. DOI: 10.12452/j.fxcsxb.23091402.
汗液是一种可无创测量的分析物,其pH值可作为诊断和监测各种生理状况的重要指标。表面增强拉曼散射技术(SERS)是一种快速、灵敏、无创、无标记的分析检测技术,但存在因信号波动导致的稳定性差等问题。该文通过制备一种内标型花瓣状间隙增强拉曼标签(PGERT)纳米颗粒并构建pH传感器,实现了对人体汗液中pH值的精确实时分析。该传感器通过在间隙结构内部修饰4-巯基苯甲氰(4-MBN)分子获得内标拉曼信号,并基于外部花瓣状壳层表面修饰pH传感分子4-巯基苯甲酸(4-MBA)获得增强的探针信号,显著提高了检测稳定性和灵敏度。该研究先使用原位分析池建立了pH 5.0~8.0条件下的标准分析曲线,相关系数(
r
2
)高达0.99。该传感器对4种不同pH值汗液(pH 5.0~7.0)的检测结果与标准pH计测试结果的误差率分别为(2.17±5.0)%、(4.62±1.1)%、(5.80±0.3)%、(3.68±1.0)%。结果表明,基于该内标型花瓣状间隙纳米拉曼标签的传感器可用于人体汗液的pH值监测,并具有高灵敏度、高稳定性以及分析精确的优点。
This study describes a non-invasive,real-time analysis of pH levels in human sweat using surface-enhanced Raman scattering(SERS) technology. The researchers addressed issues such as poor stability caused by signal fluctuations by developing a novel sensor called the petal-like gap-enhanced Raman tag(PGERT). The sensor utilizes 4-mercaptobenzonitrile(4-MBN) molecules internally for an internal standard Raman signal and externally modifies the surface with 4-mercaptobenzoic acid(4-MBA) pH-sensing molecules to enhance the probe signal. Through in situ analysis,the study established standard analysis curves under pH conditions ranging from 5.0 to 8.0,achieving a high correlation coefficient(
r
2
) of up to 0.99. The sensor demonstrated high stability and sensitivity. Error rates between the sensor's detection results for sweat at different pH levels(pH 5.0 to 7.0) and standard pH meter measurements were(2.17±5.0)%,(4.62±1.1)%,(5.80±0.3)% and (3.68±1.0)%,respectively. These results indicate that the sensor,based on the internal standard PGERT,can be applied for monitoring pH levels in human sweat,offering advantages such as high sensitivity,stability,and precise analysis.
花瓣状间隙增强拉曼标签(PGERT)内标pH检测汗液SERS
petal-like gap-enhanced Raman tags(PGERT)internal standardpH detectionsweatSERS
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