Key laboratory of Analysis and Detection Technology for Food Safety

Hefei, China

Key laboratory of Analysis and Detection Technology for Food Safety

Hefei, China

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Liu H.,Key Laboratory of Analysis and Detection Technology for Food Safety | Yu P.,Key Laboratory of Analysis and Detection Technology for Food Safety | Du D.,Central China Normal University | He C.,Key Laboratory of Analysis and Detection Technology for Food Safety | And 4 more authors.
Talanta | Year: 2010

Novel ratiometric fluorescent silica nanoparticles with high selectivity towards Hg2+ were synthesized for the detection of Hg2+. Hg2+ promoted the ring opening of spirolactam in the rhodamine moiety grafted onto the silica nanoparticles, resulting in a change in the fluorescence intensity. The fluorescence intensity was proportional to the Hg2+ concentration, and the detection limit (S/N = 3) for Hg2+ was found to be 2.59 × 10-9 mol L-1 with a linear range from 0.4 to 8 × 10-7 mol L-1. In addition, the morphology of the silica nanoparticles, the effects of pH and co-existing substances, and the reversibility were investigated. The proposed approach was successfully applied to the determination of Hg2+ in water samples. © 2010 Elsevier B.V. All rights reserved.


Jin X.,Anhui Science and Technology University | Zhou Y.,Anhui Science and Technology University | Zhou Y.,Key laboratory of Analysis and Detection Technology for Food Safety | Xu Y.,Anhui Science and Technology University | And 2 more authors.
Journal of the Chinese Cereals and Oils Association | Year: 2013

Indica rice starch has been used for gelatinization and partial gelatinization. The crystalline property as well as the changed of resistant starch(RS)storage at 25°C, 4°C and -18°C were studied. The results indicated that for the gelatinized starch, during the storage at the temperature of 25°C, 4°C and -18°C, its crystallinity rose from 0% to 7.98%, 12.53% and 11.77% respectively, storage at 25°C, 4°C and -18°C, the content of resistant starch(RS)was 4.1%, 8.6%, 6.5%; compared with 0 day content of resistant starch(RS)increased 2.7%, 7.2%, 5.1%; For partial gelatinization starch, its crystallinity rose from 11.4% to 19.11%, 24.45% and 22.89% respectively, storage at 25°C, 4°C and -18°C; the content of resistant starch(RS)was 13.8%, 17.8% and15.8%; compared with 0 day content of resistant starch(RS)increased 5.7%, 9.7%, 7.1%; compared the partial gelatinization starch with the gelatinized starch, The results indicated that the crystal rate of partial gelatinized starch was much faster, the content of resistant(RS)and slowly digested starch(SDS)had a larger quantity; compared with the storage at -18°C, 25°Cand 4°C, the crystal rate of partial gelatinized starch storage at 4°C was much faster and it was easier to be resistant starch(RS).


Yang G.,Key Laboratory of Analysis and Detection Technology for Food Safety | Yang G.,Fujian Agriculture and forestry University | Xu J.,Key Laboratory of Analysis and Detection Technology for Food Safety | Xu L.,Key Laboratory of Analysis and Detection Technology for Food Safety | And 2 more authors.
Talanta | Year: 2010

A microwave-assisted extraction used to extract trace triorganotin from aquatic organisms and a sensitive analytical method for the determination of ultratrace triorganotin (namely trimethyltin, triethyltin, tripropyltin and tributyltin) with capillary electrophoresis-inductively coupled plasma mass spectrometry were firstly described in this study. The extraction method is simple, effective and can be used to extract trace triorganotin in aquatic organisms within several min. The analytical method has a much lower detection limit of 0.2-0.7 ng Sn/mL for triorganotin compounds, and can be used to determine trace triorganotin in aquatic organisms directly without any derivatization and preconcentration. Using above methods, we have successfully determined trimethyltin, triethyltin, tripropyltin and tributyltin in dried Mya arenaria Linnaeus and Corbicula fluminea within 17 min with a recovery of 93-104% and a RSD (relative standard deviation, n = 6) of 2-5%. Our results showed that dried M. arenaria Linnaeus contained an extremely high tributyltin of 5.1 μg Sn/g dried weight, indicating that it may be a good biomarker for the organotin pollution in ocean. © 2009 Elsevier B.V. All rights reserved.


Li M.-J.,Key Laboratory of Analysis and Detection Technology for Food Safety | Zhan C.-Q.,Key Laboratory of Analysis and Detection Technology for Food Safety | Nie M.-J.,Key Laboratory of Analysis and Detection Technology for Food Safety | Chen G.-N.,Key Laboratory of Analysis and Detection Technology for Food Safety | Chen X.,Key Laboratory of Analysis and Detection Technology for Food Safety
Journal of Inorganic Biochemistry | Year: 2011

A series of the new ruthenium(II) complexes with different number of aldehyde groups have been synthesized and characterized for the simple and selective sensing of homocysteine (Hcy) and cysteine (Cys). The reaction of these ruthenium(II) complexes with Hcy and Cys afforded thiazinane or thiazolidine derivatives which resulted in the obvious changes in the UV-visible spectra and strong enhancement of the luminescence intensity of the system. The luminescence enhancement of [Ru(dmb)2(L2)]2+ (dmb: 4,4′-dimethyl-2,2′-bipyridine) showed a good linearity in the concentration of 4.2-350 μM and 6-385 μM with the detection limits of 0.3 μM and 1 μM for Hcy and Cys, respectively. The absorption and emission bands from metal-to-ligand charge transfer transition in the visible region and the large Stokes shift of the ruthenium(II) complex chromophore made it suitable for biological applications. © 2010 Elsevier Inc. All rights reserved.


Tang J.,Key Laboratory of Analysis and Detection Technology for Food Safety | Du L.,Key Laboratory of Analysis and Detection Technology for Food Safety | Pang W.-H.,Key Laboratory of Analysis and Detection Technology for Food Safety | Zheng J.-J.,Key Laboratory of Analysis and Detection Technology for Food Safety | And 2 more authors.
Chinese Journal of Chemical Physics | Year: 2011

We provide a new way to prepare ZnO nanorods pattern from the solution composed of hexamethylenetetramine (HMT) and Zn(NO 3) 2. The substrate is ITO substrate covered by well ordered Au islands. Since Au and the underneath ITO substrate have two different nucleation rates in the initial stage of heterogeneous nucleation process, the subsequent ZnO growth on the quick nucleating area takes place under diffusion control and is able to confine the synthesis of ZnO nanorods to specific locations. The concentrations of zinc nitrate and HMT are well adjusted to show the possibility of the new route for the patterning of the ZnO nanorods. Furthermore, the nanorods pattern was characterized by X-ray diffraction and photoluminescence and the performance of field emission property from ZnO nanorod patterns was investigated. The ZnO nanorods pattern with a good alignment also shows a good field enhancement behavior with a high value of the field enhancement factor. © 2011 Chinese Physical Society.

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