[Determination of Total Iron and Fe2+ in Basalt].

Basalt is the raw material of basalt fiber. The content of FeO and Fe2O3 has a great impact on the properties of basalt fibers. ICP-OES and dichromate method were used to test total Fe and Fe(2+) in basalt. Suitable instrument parameters and analysis lines of Fe were chosen for ICP-OES. The relative standard deviation (RSD) of ICP-OES is 2.2%, and the recovery is in the range of 98%~101%. The method shows simple, rapid and highly accurate for determination of total Fe and Fe(2+) in basalt. The RSD of ICP-OES and dichromate method is 0.42% and 1.4%, respectively.

Superhydrophobic cuprous oxide nanostructures on phosphor-copper meshes and their oil-water separation and oil spill cleanup.

A simple aqueous solution-immersion process was established to fabricate highly dense ordered Cu2O nanorods on commercial phosphor-copper mesh, with which the preparation was accomplished in distilled water. The present method, with the advantages of simple operation, low cost, short reaction time, and environmental friendliness, can be well adopted to fabricate desired Cu2O nanostructures on the phosphor-copper mesh under mild conditions. After surface modification with 1-dodecanethiol, the Cu2O nanostructure obtained on the phosphor-copper mesh exhibits excellent superhydrophobicity and superoleophilicity. Besides, a "mini boat" made from the as-prepared superhydrophobic phosphor-copper mesh can float freely on water surface and in situ collect oil from water surface. This demonstrates that the present approach, being facile, inexpensive, and environmentally friendly, could find promising application in oil-water separation and off shore oil spill cleanup.

[Preparation and surface modification of the magnetic fluid as a targeted drug carrier].

Magnetic fluid containing Fe(3)O(4) as mother nucleus was prepared by chemical coprecipitation and treated with dextran-70 for surface modification. The dextran-70-modified magnetic fluid was reacted with 6-bromohexanoic acid and their chemical stability was studied, with the structure characterized by using laser granulometer, X-ray diffraction, Fourier-transform infrared analysis and transmission electron microscopy. The results showed that the magnetic fluid with surface modification by dextran-70 exhibited high stability in the presence strong alkali or acid. No chemical changes occurred in the magnetic Fe(3)O(4) nucleus surrounded by alkali-treated dextran-70 and the organic chain linked to the surface dextran rendered the reaction to the anti-cancer drug such as mitomycin C possible, suggesting the potential of the preparation as a drug carrier.