The content of trace impurity elements-Fe,Na,Al, Mg-in the alloy Li17 Pb83 was measured by inductively coupled plasma emission spectroscopy （ICP-AES）. The optimization of measuring parameters was explored as well as the type and dosage of acid. And the interference effect of coexistent elements on the analysis result was also studied. The results show that the mass fractions of Fe,Na,AI,Mg in Li17Pb83 are respectively 0. 003%,0. 005 8%,0. 002 6% and 0. 002% ,when carrier gas pressure is 0.25 MPa,generator power 1.3 k W,observation height 10 mm above the coil, the volume ratio of hydrochloric acid to nitric acid 4 ： 1 and the total acid concentration 10%.

The chromogenic reaction between picramazochrom and cobalt was studied with plcramazocnrom as the chromogenie reagent. In the ammonium citrate-ammonia solution of pH10. 0,cobalt reacted with picramazochrom to form a green complex,which exhibited the maximum absorption wavelength at 670 nm with an apparent molar absorptivity of 2.62×10^4L /（mol·cm）. And Beer＇s law was obeyed in the range of 0-50μg/25 mL cobalt. When the cobalt content in cemented carbide was determined directly by the spectrophotometry with picramazochrom,the relative standard deviation was between 1.4 % and 2.1%.

The high purity niobium or tantalum oxides were firstlymelted with NaOH and leached with hot water,and then analyzed to determine their fluorin content by spectrophotometry with xylenol orange as the chromogenic reagent. The results show that the abovemethod is accurate and reliablewith high precisionand stability,and therefore can satisfy the analysis requirementfor the low content fluorin in the products of high purity niobium or tantalum oxides.

Recently-published Chinese proprietary technologies on tungsten hydrometallurgy are reviewed, and the latest development of the tungsten alkali autoclaving-ion exchange process is emphatically introduced. The development trends of Chinese tungsten metallurgical technologies are also pointed out.

The latest development of main processing methods of Chinese mixed rare earth concentrate is summarized. Some suggestions on multipurpose use of the concentrate are made.

The precise millipore filtation technology is systematically introduced,its characteristics and advantages are analyzed in the efficient wash,filtration and pressure drying of rare metal superfine powder, and some reasonable suggestions are made on generalizing this advanced technology.

The latest development of one-dimensional SiC nanoscale materials, such as SiC nanorods, nanowires, nanotubes and nanobelts,is reviewed. The important research directions of these one-dimension- al SiC nanoscale materials are also indicated.

Four main types of anode material of modern Li-ion secondary battery-Li-containing transition metal nitride, tin oxide, transition metal oxide and V-based composite oxide are reviewed. And their intercalation and de-intercalation mechanism,performance characteristic and latest development are systematically introduced.

The application of tungsten heavy alloy as a projectile material is summarized. The study and injection molding of high-performance tungsten alloy to improve the penetration ability of armour-piercing shell and APHE are introduced. The development trend of strengthening and improving the relevant study is pointed out.