Abstract:Based on the conclusions of United States Environmental Protection Agency (USEPA), the four polynulear aromatic hydrocarbons (PAH4) Chrysene, benzo(a)pyrene (BaP), benzo(a)anthracene (BaA), and benzo(b)fluoranthene (BbF) are new markers for the occurrence of PAHs in food. Vegetable oil is a type of food which easy to be contaminated by PAHs due to the raw material pollution and the imperfections in processing technology. Hence, it is of importance to establish efficient method for rapid determination of PAH4 in vegetable oil. In this research, second-derivative nonlinear variable-angle-matrix isopotential synchronous fluorescence spectroscopic approach has been proposed for simultaneous and rapid determination of Chrysene, BaA, BaP and BbF in vegetable oil with ultrasonic-assisted extraction. This method is capable of resolving the spectra of four PAHs well. The limits of detection (LODs) for Chrysene, BaA, BaP and BbF were 13.0, 8.64, 0.16 and 7.68 μg/kg, respectively. The recoveries in various oil samples for Chrysene, BaA, BaP and BbF were 86.2 ± 15.3, 93.8 ± 11.7, 93.9 ± 12.1 and 94.3 ± 7.4 %, respectively, at the spiked levels of 10 ~ 400 μg/kg. The relative standard deviations (RSDs) achieved for Chrysene, BaA, BaP and BbF were 3.0, 8.4, 6.3 and 7.2 %, respectively. The established method is simple, economical and reliable, and provides an attractive alternative for the simultaneous and rapid determination PAH4 in vegetable oil samples.

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	1. A simple flourescence spectroscopic approach for simultaneous and rapid detection of four polycyclic aromatic hydrocarbons (PAH4) in vegetable oil
	Liu Yi-Hong,Wu Ping-Ping,Liu Qian,Luo He-Dong,Cao Shuo-Hui,Lin Guo-Chun,Fu Dong-Sai,Zhong Xiu-Di,Li Yao-Qun
	Chemistry 24 November 2015
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	Abstract:Based on the conclusions of United States Environmental Protection Agency (USEPA), the four polynulear aromatic hydrocarbons (PAH4) Chrysene, benzo(a)pyrene (BaP), benzo(a)anthracene (BaA), and benzo(b)fluoranthene (BbF) are new markers for the occurrence of PAHs in food. Vegetable oil is a type of food which easy to be contaminated by PAHs due to the raw material pollution and the imperfections in processing technology. Hence, it is of importance to establish efficient method for rapid determination of PAH4 in vegetable oil. In this research, second-derivative nonlinear variable-angle-matrix isopotential synchronous fluorescence spectroscopic approach has been proposed for simultaneous and rapid determination of Chrysene, BaA, BaP and BbF in vegetable oil with ultrasonic-assisted extraction. This method is capable of resolving the spectra of four PAHs well. The limits of detection (LODs) for Chrysene, BaA, BaP and BbF were 13.0, 8.64, 0.16 and 7.68 μg/kg, respectively. The recoveries in various oil samples for Chrysene, BaA, BaP and BbF were 86.2 ± 15.3, 93.8 ± 11.7, 93.9 ± 12.1 and 94.3 ± 7.4 %, respectively, at the spiked levels of 10 ~ 400 μg/kg. The relative standard deviations (RSDs) achieved for Chrysene, BaA, BaP and BbF were 3.0, 8.4, 6.3 and 7.2 %, respectively. The established method is simple, economical and reliable, and provides an attractive alternative for the simultaneous and rapid determination PAH4 in vegetable oil samples.
	TO cite this article:Liu Yi-Hong,Wu Ping-Ping,Liu Qian, et al. A simple flourescence spectroscopic approach for simultaneous and rapid detection of four polycyclic aromatic hydrocarbons (PAH4) in vegetable oil[OL].[24 November 2015] http://en.paper.edu.cn/en_releasepaper/content/4662252


	2. A novel photoelectrochemical sensor based on graphitic carbon nitride for glyphosate detection
	Chen Sihong,Zhang Shupei,LI Yilin,Gong Lingshan,Yan Huixiang,Zhang Qingrong,Xu Guifang,Dai Hong
	Chemistry 03 November 2015
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	Abstract: A signal-on photoelectrochemical strategy with graphitic carbon nitride decorated Ag+ based on the binding-induced internal-displacement for glyphosate monitoring was established. graphite-like carbon nitride as visible light-active material possesses fine photocatalytic activity, the pyridine nitrogen units on g-C3N4 backbone could absorb Ag+ through chemical absorption and then photo-generated electrons would be reacted by Ag+, leading to the inhibition of electrons transfer and decrement of photocurrent. However, the chelate effect between Ag+ and glyphosate can promoted the constitution of current circuit and signal improvement. This economical and sensitive sensor system could be broadly applied for substance detection.
	TO cite this article:Chen Sihong,Zhang Shupei,LI Yilin, et al. A novel photoelectrochemical sensor based on graphitic carbon nitride for glyphosate detection[OL].[ 3 November 2015] http://en.paper.edu.cn/en_releasepaper/content/4659858

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	3. Ultrasensitive Sensor for Tumor Marker Based on the Magnetic NiCo2O4 Superstructure
	LI Yilin,GONG Lingshan,ZHANG Shupei,ZHANG Qingrong,YAN Huixiang,CHEN Sihong,XU Guifang,DAI Hong
	Chemistry 27 October 2015
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	Abstract:A new enzyme-free bioprobe, consisted of hematin functioned magnetic NiCo2O4 superstructure (MNS-Hb), was designed for ultrasensitive photoelectrochemical and electrochemical dual-readout immunosensing of carcinoembryonic antigen (CEA) on carbon nanohorns (CNH) support. MNS-Hb nano-hybrid exhibited much higher mimic enzyme catalytic activity and evidently amplified electrocatalytic signal.The experimental outcome demonstrated the promising application of MNS in developing ultrasensitive, cost-effective and environment friendly dual-readout immunosensor and accurate clinical diagnoses strategy for tumor markers.
	TO cite this article:LI Yilin,GONG Lingshan,ZHANG Shupei, et al. Ultrasensitive Sensor for Tumor Marker Based on the Magnetic NiCo2O4 Superstructure[OL].[27 October 2015] http://en.paper.edu.cn/en_releasepaper/content/4659262


	4. Spectroscopic Study on Cu2+-induced Abnormally Blue-Shifted Fluorescence of Rhodamine Amide Derivative Contaning a N-Acetic Acid Substituent
	ZHANG Xuan,ZHU Yingying
	Chemistry 19 October 2015
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	Abstract:In this paper, a new rhodamine derivative (RBAA) containing an ethylenediamine-N-acetic acid moiety was synthesized and its fluorescence and absorption spectra were recorded in the presence of metal cations such as Cu2+ and Hg2+, respectively. It was found that the RBAA exhibited a abnormally blue-shifted green fluorescence with Cu2+, whereas showed an orange fluorescence with Hg2+. This was ascribed to a Cu2+-induced aggregation of RBAA.
	TO cite this article:ZHANG Xuan,ZHU Yingying. Spectroscopic Study on Cu2+-induced Abnormally Blue-Shifted Fluorescence of Rhodamine Amide Derivative Contaning a N-Acetic Acid Substituent[OL].[19 October 2015] http://en.paper.edu.cn/en_releasepaper/content/4657719


	5. An enzyme-assisted electrochemiluminescent biosensor based on order mesoporous carbons
	Zhang Qingrong,Xu Guifang,Gong Lingshan,Zhang Shupei,Yan Huixiang,LI Yilin,Chen Sihong,Dai Hong
	Chemistry 18 October 2015
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	Abstract:In this paper, a strategy of developing a enzyme-assisted electrochemiluminescence (ECL) biosensor for glyphosate detection was proposed. ordered mesoporous carbons (OMC) , not only provides a protective microenvironment for enzyme but also has a synergistic effect with chitosan for the absorption of Zn2+ ions by virtue of its large surface area and high pore volume and thus employed as the matrix of proposed biosensor. Then horseradish peroxidase (HRP) was introduced to expedite the generation of ZnS Quantum dots (QDs) via accelerating the reduction of Na2S2O3 with H2O2 to yield H2S that reacted with Zn2+ ions. Glyphosate, as a kind of organic pesticide, possessed the potential to inhibited the activity of HRP, and reduce the generation of QDs. Accordingly, the proposed ECL QDs biosensor was employed to determine the Gly with excellent sensitivity, reproducibility and selectivity.
	TO cite this article:Zhang Qingrong,Xu Guifang,Gong Lingshan, et al. An enzyme-assisted electrochemiluminescent biosensor based on order mesoporous carbons[OL].[18 October 2015] http://en.paper.edu.cn/en_releasepaper/content/4658192


	6. A Photoelectrochemical Sensing Platform Based on TiO2-B nanorods/Dopamine Hybrid for Glucose Detection
	Chen Sihong,Zhang Shupei,LI Yilin,Gong Lingshan,Yan Huixiang,Zhang Qingrong,Xu Guifang,Dai Hong
	Chemistry 28 August 2015
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	Abstract:A new photoactive material, TiO2-B nanorods,was firstly used in the PEC application. To enhance absorption ability toward visible light and increase lifetime of the charge carriers, a delicate amplify strategy by introducing dopamine was developed that coordinate dopamine with under coordinated titanium atoms of TiO2-B nanorods.By virtue of covalent interaction of the amino groups between concanavalin A and dopamine, concanavalin A was attached to the TiO2-B nanorods/dopamine modified electrode surface as recognition element for glucose detection in human saliva.
	TO cite this article:Chen Sihong,Zhang Shupei,LI Yilin, et al. A Photoelectrochemical Sensing Platform Based on TiO2-B nanorods/Dopamine Hybrid for Glucose Detection[OL].[28 August 2015] http://en.paper.edu.cn/en_releasepaper/content/4653329


	7. A Photoelectrochemical Sensor Based on Carbon Nanohorns Combined With Titanate Nanotubes for Folic Acid Detection
	Chen Sihong,Zhang Shupei,LI Yilin,Gong Lingshan,Yan Huixiang,Zhang Qingrong,Xu Guifang,Dai Hong
	Chemistry 18 August 2015
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	Abstract: Dietary folic acid leads important role in metabolic function and relates to massive diseases, evaluating the capacity of folic acid accurately plays an important role in the clinical point of view and health of all mankind. A new-type photoelectrochemical sensing platform has been constructed integrating titanate nanotubes with carbon nanohorns for folic acid assay at zero potential. Titanate nanotubes possess photocatalytic activity and enhancement in separating photogenerated electron-hole pairs. Hierarchical-structured Carbon nanohorns as a electron-transport medium to capture and transmit electrons.
	TO cite this article:Chen Sihong,Zhang Shupei,LI Yilin, et al. A Photoelectrochemical Sensor Based on Carbon Nanohorns Combined With Titanate Nanotubes for Folic Acid Detection[OL].[18 August 2015] http://en.paper.edu.cn/en_releasepaper/content/4652529


	8. A Novel Enzyme-assisted Biosensing Used for α-fetoprotein Detection Based on Photoelectrochemical Platform Supported by TiO2 Mesocrystals
	LI Yilin,ZHANG Shupei,GONG Lingshan,XU Guifang,ZHANG Qingrong,DAI Hong
	Chemistry 05 May 2015
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	Abstract:An innovative photoelectrochemical immune sensing platform was firstly constructed based on the TiO2 mesocrystals and carbon nanohorns. Expectedly, TiO2 mesocrystals possesses higher solar-energy conversion and catalysis compared with conventional TiO2 single crystals, owing to the porosity of mesocrystals which resulted from mesocrystals are constructed of ordered crystalline subunits. Herein, carbon nanohorns with outstanding electrical conductivity was used to support photoactive material and accelerate the transfer of photogenerated electrons. Horseradish peroxidase was introduced by the immune recognition reaction to enzyme-assisted in situ generation of CdS QDs, which the multiplex amplification strategy successfully achieved the ultrasensitive detection of α-fetoprotein antigen. Furthermore, the results demonstrated satisfactory performances including a wide linear range from 0.1 pg mL-1 to 160 ng mL-1 and a low detection limit of 0.03 pg mL-1.
	TO cite this article:LI Yilin,ZHANG Shupei,GONG Lingshan, et al. A Novel Enzyme-assisted Biosensing Used for α-fetoprotein Detection Based on Photoelectrochemical Platform Supported by TiO2 Mesocrystals[OL].[ 5 May 2015] http://en.paper.edu.cn/en_releasepaper/content/4641279


	9. Dual-signals Electrochemiluninescence biosensor for Detecting Metallothionein based on TiO2 Mesocrystals
	ZHANG Qingrong,XU Guifang,ZHANG Shupei,GONG Lingshan,YAN Huixiang,LI Yilin,DAI Hong
	Chemistry 29 March 2015
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	Abstract:Herein, an ultrasensitive dual-signals electrochemiluminescent (ECL) biosensor for metallothionein was proposed that used superstructure TiO2 mesocrystals. In this approach, TiO2 mesocrystals were first casted on glassy carbon electrode to construct duals-responses ECL biosensor. The dual-responses ECL approach for detecting metallothionein based on solid state electrochemiluminescence origined from Ru(bpy)32+ and CdS quantum dots. Ru(bpy)32+ was firstly immobilized on the Nafion-TiO2 modified electrode by using the ion exchanging technology, then metallothinein was associated with TiO2 mesocrystals via hydrogen bond. In the presence of metallothinein that possessed -SH groups, the CdS QDs could be attached on metallothinein by Cd-S bond. Thus, the ECL signals occurred at +1.2V and -1.4V (vs Ag/AgCl) that were resulted from Ru(bpy)32+ and CdS QDs. Moreover, the ECL images of the dual-signals were recorded firstly in this paper. And the porous TiO2 mesocrystals could not only extend outer Helmholtz plane, but also make the pH in the composite film higher, resulting in Ru(bpy)32+ possessing strong ECL intensity in moderate condition. Thus, a dual-responses electrochemiluminescent biosensor was proposed for the determination of metallothionein. And the ratio of ECL intensities at the two excitation potentials was used to quantitate metallothionein, which exhibited that the developed metallothionein sensor displayed dramatically analytical performance with wide linear range from 5 ng/mL to 1×10^4 ng/mL and the detection limit was 1.67 ng/mL at a signal-to-noise ratio of 3. Along with these attractive features, the as-proposed sensor also displayed a remarkable specificity against other interferents and could be successfully used for detecting metallothionein in the real samples. Thus it provided a promising format for the future development of multiplex electrochemiluminescence biosensors.
	TO cite this article:ZHANG Qingrong,XU Guifang,ZHANG Shupei, et al. Dual-signals Electrochemiluninescence biosensor for Detecting Metallothionein based on TiO2 Mesocrystals[OL].[29 March 2015] http://en.paper.edu.cn/en_releasepaper/content/4635912


	10. A novel non-enzymatic glucose sensor based on the ultrafine Co3O4 nanocrystals embedded ordered mesoporous carbon
	LI Mian,BO Xiangjie,ZHANG Yufan,GUO Liping
	Chemistry 22 December 2014
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	Abstract:In this paper, a novel tiny Co3O4 nanocrystals embedded ordered mesoporous carbon (Co3O4-OMC) has been prepared for the first time without using any surfactants, harmful organic reagents or extreme conditions. Structural characterizations reveal that the size-controlled Co3O4 nanocrystals are uniformly dispersed on carbon matrices. Electrochemical measurements reveal that Co3O4-OMC can more efficiently catalyze glucose oxidation and acquire better detection parameters compared with those for the free Co3O4 nanoparticles (NPs) (such as: the large sensitivity (2597.5 μA cm?2 mM?1 between 0 and 0.8 mM and 955.9 μA cm?2 mM?1 between 0.9 and 7.0 mM), fast response time, wide linear range, good stability, and surpassingly selective capability to electroactive molecules or Cl-). Such excellent performances are attributed to the synergistic effect of the following three factors: (1) the high catalytic sites provided by the uniformly dispersed and size-controlled Co3O4 nanocrystals embedded on OMC; (2) the excellent reactant transport efficiency caused by the abundant mesoporous structures of OMC matrix: (3) the improved electron transport in high electron transfer rate (confinement of the Co3O4 NPs in nanoscale spaces ensured intimate contact between Co3O4 nanocrystals and the conducting OMC matrix). The superior catalytic activity and selectivity make Co3O4-OMC very promising for application in direct detection of glucose.
	TO cite this article:LI Mian,BO Xiangjie,ZHANG Yufan, et al. A novel non-enzymatic glucose sensor based on the ultrafine Co3O4 nanocrystals embedded ordered mesoporous carbon[OL].[22 December 2014] http://en.paper.edu.cn/en_releasepaper/content/4624125

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