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at second stage with zinc powder and arsenic trioxide. In this research, a new approach is described for determination of effective parameters and optimization of zinc electrolyte hot purification process... size distributions (S1-S5), and 0.1-0.5 g/L (C) for arsenic trioxide mass concentration. Optimum conditions for hot purification obtained in this work are T4 (85 °C), t4=75 min, M4=3.5 g/L, S4 (Serie 4......
, the sodium arsenate solution could be further reduced by sulfur dioxide (SO2) gas to arsenite, at a reduction yield of 92% under the suitable conditions. Arsenic trioxide with regular octahedron shape could..., and arsenic trioxide preparation, provides an attractive approach to realize the resource utilization of arsenic-containing cobalt and nickel slag. Key words: arsenic-containing cobalt and nickel......
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硅钼蓝分光光度法测定三氧化二砷中二氧化硅谢辉1,赖心1,黄葡英1(1.广东省广州市广州有色金属研究院分析测试中心)摘 要:研究了在三氧化二砷中加入盐酸,加热除砷,所得残渣用氢氧化钠溶解,硝酸酸化后,以钼酸铵为显色剂,在pH 0.9条件下,硅与钼酸盐形成硅钼黄络合物,用硫酸提高酸度,以抗坏血酸为还原剂,使硅形成稳定的硅钼蓝络合物,采用分光光度法测定其中的二氧化硅含量.硅钼蓝络合物最大吸收波长位于813nm处.本法相对标准偏差(RSD)为1.6%~1.9%(n=6),测定结果与ICP-AES法的结果相一致.
熔融制样-X射线荧光光谱法测定三氧化钼中7种组分王宝玲1,李小莉2,田文辉1(1.陕西省渭南市华县金堆城质量计量监测中心2.天津地质矿产研究所,天津 300170)摘 要:采用无水四硼酸锂熔融制样,建立了用波长色散X射线荧光光谱(XRF)法测定三氧化钼中MoO3,Pb,Cu,SiO2,CaO,Fe2O3,K2O 7种组分的方法.以Mo为主要分析元素分别对仪器参数,分析谱线,曲线拟合进行了研究,并详细讨论了熔融法制样条件中熔剂的选择,脱模剂的选择,熔融温度和熔融时间的确定.采用经过多次化学分析的样品作为标准样品绘......
键词:钨酸钠溶液;水热处理;焦绿石型三氧化钨;超细粉体 中图分类号:TF841.1 文献标志码:A Preparation of ultrafine pyrochlore-type tungsten trioxide powder by hydrothermal..., Changsha 410083, China) Abstract: The ultrafine pyrochlore-type tungsten trioxide powders were hydrothermally synthesized from sodium tungstate solution by adding pure WO3 powders to the reaction system......
concentration decreases after a certain time at temperature above 100 °C. Furthermore, the undissolved tungsten exists in the form of either APT·4H2O below 90 °C or pyrochlore-type tungsten trioxide above 100 °C... provide a new idea to exploit a novel technique for manufacturing ammonium paratungstate and pyrochlore-type tungsten trioxide. Key words: ammonium paratungstate; dissolving behavior; ammonium carbonate......
after 50 cycles at 20 mA/g, indicating that the material is extremely promising for application in LIBs. Key words: antimony trioxide; spherical tremella-like structure; metal organic frameworks; anode... Zheng-wen. Electrochemical reaction of lithium with nanostructured thin film of antimony trioxide [J]. Electrochemical Communications, 2006, 8(8): 1250-1256. [12] SIMONIN L, LAFONT U, TABRIZI N, SCHMIDT......
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was studied, thus providing the basis for preparation of capacitor ceramics. Key words:dysprosium trioxide; ceramic capacitor; barium and strontium titanate; rare earths; [全文内容正在添加中] ......