[Determination of 22 mycotoxins in milk by liquid chromatography-quadrupole/orbitrap mass spectrometry].

Mycotoxins have carcinogenic, mutagenic, hepatotoxic, nephrotoxic, immunotoxic, neurotoxic, and teratogenic properties. Thus, these substances have attracted significant attention because they pose a threat to human health. As research on mycotoxins deepens, new structural analogues of mycotoxins are constantly being discovered.

Catalytic spectrophotometric determination of trace aluminium with indigo carmine.

A new catalytic spectrophotometric method is described for the determination of trace amounts of Al(III). The methods based on catalytic action of Al(III) on the oxidation of indigo carmine (IC) by ammonium persulfate in hexamethylene tetramine-hydrochloric acid ((CH2)6N4-HCl) buffer medium (pH 5.4) and in the presence of surfactant-TritonX-100.

[New development of modern photometric determination of trace aluminium in environmental samples].

In this paper, new development of modern photometric determination of aluminium in environmental samples in recent years was reviewed and discussed. The new development in modem photometric determination of aluminium in environmental samples was emphasized, including micelle photometric method, dual-wavelength photometric method, derivative photometric method, catalytic photometric method, solid phase photometric method and flow injection photometric method. Reaction systems of determination and it's conditions, molar absorption coefficient (epsilon) or the limit of detection, the scope of determination and applications of the ordinary photometric method, and the micelle photometric method were summarized.

[Biosence technology applied to environment monitoring].

The applications of biosensors and sensing technology in environment analysis and monitoring in water, air and others are reviewed, and the prospects of biosensor and sensing technology are discussed in this paper, including the determinations of BOD, phenols, nitrate and organophosphorous compounds, and the monitoring of red tides in water, the detections of carbon dioxide, sulfur dioxide and nitrogen oxide in atmosphere; the detections of poisonous residue and persistent organic pollutants; toxicity assessment and the determination of bacteria population.

[Study on preparation of lanthanum-doped TiO2 nanometer thin film materials and its photocatalytic activity].

In this paper, lanthanum-doped TiO2 nanometer film materials coated on glass were prepared in Ti(OBu)4 precursor solutions by sol-gel processing. Transmittance and photocatalytic activity were respectively investigated and tested for these nanometer thin films prepared with different amount of lanthanum (La), different amount of polyethylene glycol (PEG), and different coating layer times. Some reactive mechanisms were also discussed.