TAN螯合物高效液相色谱分离和测定铜（Ⅱ）,镍（Ⅱ）,钴（Ⅱ）

以1-(2-噻唑偶氮)-2-萘酚(TAN)螯合物,于Shim-pack CLC-CN柱上,用含甲醇-四氢呋喃-醋酸-醋酸钠缓冲液(pH=3.5)-乙醇(60:19.8:19.8:0.4 V/V)溶液作流动相,并用分光光度检测器于570nm处进行检测,发展了一种高效液相色谱分离测定铜(Ⅱ),镍(Ⅱ),钴(Ⅱ)的方法.此法具有高的灵敏度,其绝对检测限分别为:铜(Ⅱ)1.8ng,镍(Ⅱ)1.8ng和钴(Ⅱ)0.6ng.在测定条件下,大多数金属离子不干扰.     

催化光度法测定桃叶和地下水中痕量铜

本文研究了痕量铜(Ⅱ)对H_2O_2氧化乙二醛缩双(2-羟基苯胺)指示反应的催化效应,NH_4F的加入提高了反应的灵敏度和选择性。在反应温度65℃、反应时间30分钟,酸度为pH6.0的条件下,在波长438nm处附近具有最大吸收,其检出限为4×10~(-4)μg/ml,铜的浓度在0-0.1μg/25ml范围内符合比耳定律。应用此法测定桃叶及地下水中痕量铜准确、快速。     

表面粗糙度的交流阻抗研究及其在铜电极上的应用

固液界面交流阻抗测量时所得Ｎｙｑｕｉｓｔ图往往为压扁的半圆弧，其等效电路中含常相元件，该元件的分数指数与粗糙表面的分形模型有关，本文提出从Ｎｙｑｕｉｓｔ图计算分散指数与粗糙表面的分数维数的方法，并各种上不同表面处理的铜电极说明计算方法的应用及其结果，文中的方法还可用于表面膜致密程度的表征。     

Visual Basic编程用于络合物稳定常数的数据处理

当金属离子与弱酸或弱碱络合时,将引起溶液中ｐＨ值的显著变化,用ｐＨ滴定法测定该络合物的逐级稳定常数．根据Ｂｅｊｅｒｒｕｍ生成函数概念ｎＭ＝ＣＬ－［Ｌ］ＣＭ（１）采用ＶｉｓｕａｌＢａｓｉｃ编程,经微机处理即可便捷准确地计算出络合物的逐级稳定常数,该法是...     

Spatial distribution of Cd and Cu in soils in Shenyang Zhangshi Irrigation Area （SZIA）, China

Heavy metal contamination of soils, derived from sewage irrigation, mining and inappropriate utilization of various agrochemicals and pesticides, and so on, has been of wide concern in the last several decades. The Shenyang Zhangshi Irrigation Area （SZIA） in China is a representative area of heavy metal contamination of soils resulting from sewage irrigation for about 30 years. This study investigated the spatial distribution and temporal variation of soil cadmium （Cd） and copper （Cu） contamination in the SZIA. The soil samples were collected from the SZIA in 1990 and 2004; Cd and Cu in soils was analyzed and then the spatial distribution and temporal variation of Cd and Cu in soils were modeled using Kriging methods. The results show that long-term sewage irrigation had caused serious Cd and Cu contamination in soils. The mean and the maximum of soil Cd are markedly higher than the levels in second grade standard soil （LSGSS） in China, and the maximum of soil Cu is close to the LSGSS in China in 2004 and is more than the LSGSS in China in 1990. The contamination magnitude of soil Cd and the soil extent of Cd con- tamination had evidently increased since sewage irrigation ceased in 1992. The contamination magnitude of soil Cu and the soil extent of Cu contamination had evidently increased in topsoil, but obviously decresed in subsoil. The soil contamination of Cd and Cu was mainly related to Cd and Cu reactivation of contaminated sediments in Shenyang Xi River and the import of Cd and Cu during irrigation. The eluviation of Cd and Cu in contaminated topsoil with rainfall and irrigation water was another factor of temporal-spatial variability of Cd and Cu contamination in soils.     

铜杆轧机轧制力计算及1号轧机零件强度核算

根据西姆斯公式计算连轧机轧制力，并在此基础上核算１号轧机零件强度和寿命。     

空穴浓度和基底对金属基外延石墨烯态密度的影响

以吸附在金属铜基底上的外延石墨烯为例, 研究了空穴浓度随温度的变化,探讨了空穴浓度和基底以及温度对金属基外延石墨烯态密度的影响。结果表明：(1)空穴浓度随温度升高而非线性增大,铜基底外延石墨烯的空穴浓度随温度的变化率小于石墨烯的相应值;(2)与石墨烯相比,基底的存在使铜基外延石墨烯的空穴浓度随温度的变化要迅速增大,态密度在电子能量为0时的值要增大,而态密度极大值相应的电子能量（称为最可几能量）变小;(3)铜基外延石墨烯的态密度随空穴浓度的增大和温度的升高而减小,其中,随空穴浓度的变化为线性,而随温度的变化为非线性。