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甘肃政法大学 司法警察学院 甘肃省证据科学技术研究与应用重点实验室,甘肃 兰州 730070
刘迪,博士,副研究员,研究方向:药品快检技术,E-mail:775045557@qq.com
收稿日期:2024-11-12,
修回日期:2025-02-24,
纸质出版日期:2025-07-15
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任书芳,刘亚慧,曹莉,王子涵,陈雨,刘迪.基于UiO-66-NH2金属有机框架复合MWCNTs电化学传感器构建及吗啡检测[J].分析测试学报,2025,44(07):1313-1320.
REN Shu-fang,LIU Ya-hui,CAO Li,WANG Zi-han,CHEN Yu,LIU Di.Construction of an Electrochemical Sensor Based on UiO-66-NH2 Metal-Organic Framework Composite with MWCNTs for Morphine Detection[J].Journal of Instrumental Analysis,2025,44(07):1313-1320.
任书芳,刘亚慧,曹莉,王子涵,陈雨,刘迪.基于UiO-66-NH2金属有机框架复合MWCNTs电化学传感器构建及吗啡检测[J].分析测试学报,2025,44(07):1313-1320. DOI: 10.12452/j.fxcsxb.241112522.
REN Shu-fang,LIU Ya-hui,CAO Li,WANG Zi-han,CHEN Yu,LIU Di.Construction of an Electrochemical Sensor Based on UiO-66-NH2 Metal-Organic Framework Composite with MWCNTs for Morphine Detection[J].Journal of Instrumental Analysis,2025,44(07):1313-1320. DOI: 10.12452/j.fxcsxb.241112522.
利用水热法和超声机械混合法制备了多孔金属有机框架材料(UiO-66-NH
2
)复配MWCNTs复合材料,利用滴涂法构筑了电化学传感器。采用X射线衍射法仪、场发射扫描电镜、场发射透射电镜及傅里叶变换红外光谱等分析了材料的成分及形貌结构;采用循环伏安法,以铁氰化钾为电子探针考察了修饰电极的电化学性能,脉冲伏安法考察了电极对吗啡的电化学响应性。并对检测条件如修饰材料质量比、富集时间、pH值等参数进行了优化。结果表明所构筑的传感器对吗啡有较高的电化学响应性,检测线性范围为10~100 μmol/L,检出限(
S
/
N
=3)为9.922 μmol/L。传感器具有良好的稳定性、重复性(RSD=4.1%)和抗干扰性(RSD
<
5.0%)。采用标准加入法对汗液和尿液样品中的吗啡进行检测,加标回收率为92.1%~98.4%,RSD(
n=
3)低于5.0%。
Porous metal-organic framework materials(UiO-66-NH
2
) were prepared using hydrothermal and composite materials of UiO-66-NH
2
/multi-walled carbon nanotubes(MWCNTs) were formed using ultrasonic mechanical mixing method. An electrochemical sensor was constructed using the drop-coating method. The composition and morphological structure of the materials were analyzed using X-ray diffraction,field emission scanning electron microscopy,field emission transmission electron microscope and Fourier-transform infrared spectroscopy. The electrochemical performance of the modified electrode was
investigated using cyclic voltammetry with potassium ferricyanide as the electron probe,and the electrochemical response of the electrode to morphine was examined using pulse voltammetry. The detection conditions,such as the mass ratio of the modified materials,enrichment time,and pH were optimized. The constructed sensor exhibited a high electrochemical response to morphine,with a linear detection range of 10-100 μmol/L and a minimum detection limit(
S
/
N
=3)of 9.922 μmol/L. The sensor demonstrated good stability,repeatability(RSD=4.1%),and anti-interference ability(RSD
<
5.0%). The standard addition method was used to detect morphine in sweat and urine samples with recoveries of 92.1%-98.4% and RSD(
n
=3) below 5.0%.
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