Enhancement of Lewis Acidity of Cr-Doped Nanocrystalline SnO : Effect on Surface NH Oxidation and Sensory Detection Pattern.

Understanding ammonia oxidation over metal oxide surfaces is crucial for improving its detection with resistive type gas sensors. Formation of NO during this process makes sensor response and calibration unstable. Cr-doping of nanocrystalline metal oxides has been reported to suppress NO sensitivity and improve response towards NH , however the exact mechanism of such chromium action remained unknown.

Determination of gallium originated from a gallium-based anticancer drug in human urine using ICP-MS.

Urine analysis gives an insight into the excretion of the administered drug which is related to its reactivity and toxicity. In this work, the capability of inductively coupled plasma mass spectrometry (ICP-MS) to measure ultratrace metal levels was utilized for rapid assaying of gallium originating from the novel gallium anticancer drug, tris(8-quinolinolato)gallium(III) (GaQ(3)), in human urine. Sample dilution with 1% (v/v) HNO(3) as the only required pre-treatment was shown to prevent contamination of the sample introduction system and to reduce polyatomic interferences from sample components.