A novel gaseous dimethylamine sensor utilizing cataluminescence on zirconia nanoparticles.

A novel cataluminescence (CTL) sensor using ZrO2 nanoparticles as the sensing material was developed for the determination of trace dimethylamine in air samples based on the catalytic chemiluminescence (CL) of dimethylamine on the surface of ZrO2 nanoparticles. The CTL characteristics and the different factors on the signal intensity for the sensor, including nanomaterials, working temperature, wavelength and airflow rate, were investigated in detail. The CL intensity on ZrO2 nanoparticles was the strongest among the seven examined catalysts.

A novel gaseous pinacolyl alcohol sensor utilizing cataluminescence on alumina nanowires prepared by supercritical fluid drying.

A cataluminescence (CTL) sensor using Al2O3 nanowires as the sensing material was developed for the determination of trace pinacolyl alcohol in air samples based on the catalytic chemiluminescence (CL) of pinacolyl alcohol on Al2O3 nanowires. Eight catalysts were examined and the CL intensity on Al2O3 nanowires prepared by supercritical fluid drying was the strongest. This novel CL sensor showed high sensitivity and selectivity to gaseous pinacolyl alcohol at optimal temperature of 340 degrees C.

[Determination of phenylarsenic compounds in environmental samples by high performance liquid chromatography].

A reversed-phase high performance liquid chromatographic method was developed for simultaneous determination of phenylarsonic acid (PAA), phenylarsine oxide (PAO), diphenylarsinic acid (DPAA), bis (diphenylarsine) oxide (BDPAO) and triphenylarsine (TPA) in soil samples. The extraction solvent for soil samples was acetonitrile and ultrasound was used in the extraction. Good separation was achieved by using an Inertsil CN-3 column (250 mm x 4.

Piezoelectric immunosensor for SARS-associated coronavirus in sputum.

A piezoelectric immunosensor was developed for the detection of SARS-associated coronavirus (SARS-CoV) in sputum in the gas phase. Horse polyclonal antibody against SARS-CoV was bound onto the PZ crystal surface in an ordered orientation through protein A. The antigen sample was atomized into aerosol by an ultrasonator, by which the antibody on the crystal could specifically adsorb SARS antigen and the changed mass of crystal would lead a frequency shift.