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A column-switching system, composed of supercritical fluid chromatography (SFC) and reverse phase liquid chromatography/mass spectrometry (RPLC/MS) was developed for the analysis of vitamin D in oily and fatty matrices. The SFC with the similar retention behavior as normal-phase liquid chromatography (NPLC), was applied for an on-line clean-up of oily and fatty samples, then followed by separation...
The gold nanoparticles (Au NPs) modified porous silicon chip based surface assisted laser desorption/ionization mass spectrometry (SALDI-MS) was developed to capture and analyze glutathione (GSH) in cells. With silver-assisted chemical etching, Ag nanoparticles (Ag NPs) were generated and deposited on the silicon surface and the nanopores were etched on silicon substrate. Then Au NPs were in-situ...
The ability of single or several cells introduction onto substrate simply would be a useful tool for matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS). In this study, we aimed to establish a sample introduction method for pattering cells to the substrate by inkjet technology. Inkjet driving, substrate surface and relative humidity were optimized for single or several cells introduction...
A new sensitized chemiluminescence (CL) was developed to broaden the analytical application of KIO4–H2O2 system. The nitrogen doped carbon dots (N-CDs) dramatically boosted the CL intensity of KIO4–H2O2 system which was further enriched by basic medium. In light of EPR analysis, free radical scavenging studies and CL spectra the detail mechanism for the enhancement was conferred in the presence of...
Bladder cancer (BC) cells spontaneously exfoliated in the urine of patients with BC. Detection of exfoliated tumor cells has clinical significance in cancer therapy because it would enable earlier non-invasive screening, diagnosis, or prognosis of BC. In this research, a method for analyzing genetic abnormalities of BC cells collected from urine samples was developed. Target BC cells were isolated...
In this work, chemiluminescence (CL) from peroxynitrous acid (ONOOH)–carbonate system greatly amplified by carbon dots was observed. The CL mechanism of the ONOOH–carbonate–carbon dots system has been investigated and the results reveal that the carbon dots could serve as the energy acceptor, which gives us new insight into the optical properties of the new emerging carbon nanomaterial. There is a...
In this work, a simple and convenient method for the detection of mini-short tandem repeat (miniSTR) loci has been developed by the combination of polymerase chain reaction (PCR) and microchip electrophoresis (MCE). Degraded or inhibitor DNA greatly limited STR loci analysis. Therefore, The proper primers was designed as close as possible to the STRs region to produce smaller size STRs, and made the...
Determination of brominated flame retardants in electrical and electronic equipments (EEE) was achieved through microwave-assisted extraction (MAE) and gas chromatography–mass spectrometry. Polybrominated biphenyls (PBBs) and polybrominated diphenyl ethers (PBDEs) including mono-brominated through deca-brominated congeners were qualified and quantified with good linearity (0.9963–0.9998) and repeatability...
Monodisperse magnetic C 18 microspheres were prepared based on the three-step reactions of solvothermal reduction, silanization and alkylation. The microspheres are of uniform sizes in the range of 200–260nm. The structure of synthesized magnetic C 18 microspheres was studied by transmission electron microscopy, scanning electron microscopy, X-ray diffraction patterns, element analysis...
A simple, rapid and sensitive method for the determination of chromium(III) and total chromium using the simple dual T channels on glass chip with negative pressure pumping system and chemiluminescence (CL) detection is presented. The CL reaction was based on luminol oxidation by hydrogen peroxide in basic aqueous solution catalyzed by chromium(III). Total chromium in form of chromium(III) was achieved...
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