Baoyu Gong

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The presence of humic substances in conditioning films deposited on solid surfaces from natural waters was investigated using electron impact (EI), chemical ionization (CI) and secondary ion time-of-flight mass spectrometry (TOFSIMS). EI and CI spectra of a freshwater sample from a pond in Centennial Park, Sydney, Australia, showed a high degree of(More)
Tributyl phosphate (TBP) has been found to be a sensitivity-enhancing solvent for organotin compounds in graphite furnace atomic absorption spectrometry; (C(4)H(9))(2)Sn(O(2)CCH(3))(2), (C(4)H(9))(2)Sn(O(2)CC(11)H(23))(2), (C(4)H(9))(3)SnCl, and (C(4)H(9))(4)Sn all give 1 order of magnitude higher sensitivities in TBP than in toluene or ethyl acetate. The(More)
The composition and structure of the surface layers of a series of silica particles (10-20 microns across), embedded in a bituminous coal from the Whybrow seam, Sydney Basin, Australia, have been characterized in situ using time-of-flight secondary ion mass spectrometry (TOFSIMS), ion imaging, and depth profiling. The silica particles investigated are(More)
Light scattering detection of a single particle is significant to both theoretical developments and application progresses of particle scattering. In this work, a new method employing the polydimethylsiloxane microfluidic catcher with self-regulation was developed to detect the light scattering of an individual micro particle (20.42, 23.75, and 31.10 μm) in(More)
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