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二溴对氯偶氮氯膦固相萃取-分光光度法测定痕量钇李慧芝1,张瑾1,解文秀1,曹法全1(1.山东省济南市济南大学化学化工学院)摘 要:在pH3.0的盐酸-醋酸钠缓冲介质中,在甜菜碱存在下,二溴对氯偶氮氯膦(DBCC-PA)与钇Ⅲ反应生成摩尔比为2∶1的稳定络合物,该络合物可用阳离子交换树脂固相萃取柱富集,吸附柱上富集的络合物用乙醇+盐酸洗脱后用分光光度法测定.分离后的测定液中,络合物最大吸收波长为620 nm,表现摩尔吸光系数ε=1.065×105 L·mol-1·cm-1,钇Ⅲ含量在0~1.0μg/mL内符合比尔......
4-(2-吡啶偶氮)间苯二酚固相萃取分光光度法测定痕量铂李慧芝1,张瑾1,解文秀1,曹法全1(1.山东省济南市济南大学化学化工学院)摘 要:研究了4-(2-吡啶偶氮)间苯二酚与铂(Ⅳ)的显色反应,建立了一个测定铂的光度分析新方法.在pH5.0的醋酸-醋酸钠缓冲介质中,溴化十六烷基三甲基铵(CTMAB)存在下,4-(2-吡啶偶氮)间苯二酚与铂(Ⅳ)反应生成摩尔比为2∶1稳定络合物,该络合物可用阳离子交换树脂固相萃取柱富集,吸附柱上富集的络合物用乙醇洗脱后用分光光度法测定.分离后的测定液中,络合物最大吸收波长为49......
FORMATION OF MANGANESE SILICIDE THIN FILMS BY SOLID PHASE REACTION E.Q.Xie1,W.W.Wang1,D.Y.He1,N.Jiang1 (1.Department of Physics,Lanzhou University,Lanzhou 730000,China) Abstract:Manganese silicide MnSi2-x thin films have been prepared on n-type silicon substratesthrough solid phase reaction. The heterostructures were analyzed by X-ray diffraction,Rutherford backscattering spectroscopy, Fourier......
DBC-偶氮氯膦固相光度法测定痕量镧 张伟1,胡伟华1,李景梅1,翟庆洲1,邵晶1 (1.长春理工大学,纳米技术研究中心,吉林,长春,130022) 摘要:在0.5 mo1·L-1盐酸介质中,La(Ⅲ)-(DBC-偶氮氯膦)所形成的络合物可吸附到201×7型苯乙烯阴离子树脂上.该固相显色体系最大吸收波长位于650 nm,镧的表观摩尔吸光系数为ε650nm=2.08×l05L·mol-1·cm-1.该固相分光光度法测定镧灵敏度为La(Ⅲ)-(DBC-偶氮氯膦)液相分光光度法灵敏度的2.31倍.镧在0~0.44 μg.ml-1范围内遵守比尔定律.考察了26种共存离子对测定镧的影响.本研究所建立的方法已成功地用于分子筛中镧的测定,结果满意. 关键词:固相光度法; 镧; DBC-偶氮氯膦; solid phase spectrophotometry; lanthanum; DBC......
J. Cent. South Univ. Technol. (2007)04-0467-07 DOI: 10.1007/s11771-007-0091-3 Isolation of Leptospirillum ferriphilum by single-layered solid medium LIU Jian-she(柳建设)1,2, XIE Xue-hui(谢学辉)1, XIAO... solid medium. Colony was cultured and bacteria were collected. The morphologies of the object bacteria were observed using crystal violet staining, scanning electron microscope(SEM) and transmission......
阴离子交换固相萃取在测定铜矿和粗铜中金的应用周陶鸿1,黄健1,田琼1,王宛2(1.广东省湛江市湛江出入境检验检疫局2.天津博纳艾杰尔科技有限公司,天津 300457)摘 要:采用新型阴离子交换树脂作填充剂,制得固相萃取柱,经稀盐酸洗涤后,应用于含金样品溶液中金的分离富集.对分离和富集金的条件进行研究,结果表明,用25 mL 10%(V/V)盐酸试液以2 mL/min流速过柱,然后用30 g/L硫脲盐酸溶液洗脱柱上的金,可实现样品溶液中0.1~5.0μg/mL金的富集和洗脱.洗脱后的金用电感耦合等离子体发射光谱仪......
structure were discovered. Temperature dependency of ionic conductivity was measured. Key words:phase diagrams; solid solutions; phosphates; solid-state electrolytes; [全文内容正在添加中] ...Phase Stability and Ionic Conductivity of NASICON-Like Phases in ScPO4-Na3PO4-Li3PO4 Ternary System Akira Yoshikawa1,Mariya Zhuravleva1,Galina Zimina2,Tsuguo Fukuda1,Andrey Novoselov1,Valeriy......
decomposition is500℃. And the solid solution break into the lean and the rich areas, moreover the rich solute areas would have ordering arrangement to form ordering phase. 关键词:alloy; spinodal decomposition...Phase Separation Process at Early Aging Stage of Ni42CrTiAl Jiao shao-yang1,XU Bing-she1,HU lan-qing1,WEI Ying-hui1,HOU Li-feng1 (1.Taiyuan University of Technology, Taiyuan, China) 摘要:Phase......
to the first peaks in the transformation rate, which are not thermally activated. 关键词:solid state phase transformation; iron-based alloys; microstructure; dilatometry; [全文内容正在添加中] ..., an abnormal γ→α phase transformation was recognized, while normal reaction,i.e. one peak continuous reaction, was also detected. The occurrence the one or the other type of γ→α transformation strongly depends......
zinc, dissolution of the solid in liquid phase and formation of intermetallic compound layers at the interface take place simultaneously. In previous work[9], the dissolution behavior of solid nickel...; (c) Microstructure of intermetallic particles near solid/liquid interface in Fig.1 are shown in Table 1 and Fig.2 in terms of EDS results and Fe-Zn-Ni ternary phase[14]. As seen from Fig.1......