以纳米MCM-41孔道为模版,组装制备了二溴对氯偶氮胂(DBC-ASA)纳米簇合物。采用化学分析、粉末X-射线衍射、77 K N2吸附-解吸附、红外光谱、固体扩散漫反射光谱及发光光谱表征了制备的(MCM-41)-(DBC-ASA)主-客体纳米复合材料。结果表明,D...以纳米MCM-41孔道为模版,组装制备了二溴对氯偶氮胂(DBC-ASA)纳米簇合物。采用化学分析、粉末X-射线衍射、77 K N2吸附-解吸附、红外光谱、固体扩散漫反射光谱及发光光谱表征了制备的(MCM-41)-(DBC-ASA)主-客体纳米复合材料。结果表明,DBC-ASA成功地组装在了主体MCM-41中,并且处于主体分子筛材料的纳米孔道中。(MCM-41)-(DBC-ASA)纳米复合材料具有作为发光材料的应用前景。展开更多
The interaction of arsenazo Ⅲ with serum albumin and the optimum condition for the determination of protein were investigated by spectrophotometry.In a Clark—Lubs buffer solution of pH 3.0,arsenazo Ⅲ interacts with...The interaction of arsenazo Ⅲ with serum albumin and the optimum condition for the determination of protein were investigated by spectrophotometry.In a Clark—Lubs buffer solution of pH 3.0,arsenazo Ⅲ interacts with bovine serum albumin and they form a compound with an maximum absorption wavelength of 550 nm in the presence of surfactant OP.The apparent molar absorptivity of the compound is ε550nm=4.36×105L·mol-1·cm-1.Beer’s law is obeyed over 0～80mg·L-1of protein.The proteins in human serum were determined by the proposed methed with satisfactory results.展开更多
In the medium of 0.60 mol/L nitric acid,chromium（Ⅵ）reacts with DBC-arsenazo to produce color-fading reaction.Chromium（Ⅵ） was determined based on this reaction.The aqqarent molar absorptivity of the method is ε5...In the medium of 0.60 mol/L nitric acid,chromium（Ⅵ）reacts with DBC-arsenazo to produce color-fading reaction.Chromium（Ⅵ） was determined based on this reaction.The aqqarent molar absorptivity of the method is ε520nm=2.31×105L·mol-1·cm-1.Beer’s law is obeyed over the range of 1.0-8.0μg/25mL of chromium（Ⅵ）.The method was applied to the determination of chromium in the soil samples.展开更多
以水热法合成出介孔泡沫二氧化硅材料(MCFs),以MCFs吸附茜素红S得到最佳吸附条件,最大吸附容量为3.750 mg/g。从293.15~323.15 K温度区间获得了吸附体系的热力学性质,反应焓变△H0=48.038 k J/mol>0,说明MCFs吸附茜素红S的过程属于...以水热法合成出介孔泡沫二氧化硅材料(MCFs),以MCFs吸附茜素红S得到最佳吸附条件,最大吸附容量为3.750 mg/g。从293.15~323.15 K温度区间获得了吸附体系的热力学性质,反应焓变△H0=48.038 k J/mol>0,说明MCFs吸附茜素红S的过程属于吸热反应。熵变△S0=243.3 J/(mol·K)>0,说明MCFs吸附茜素红S为熵增加过程。该温度区间吸附反应的自由能变化值△G0<0,该吸附处于自发反应,而且吸附反应同时伴随物理吸附和化学吸附。MCFs吸附茜素红S的过程符合动力学准二阶方程。Freundlich吸附等温方程拟合效果较之Langmuir更好,吸附结果符合Freundlich吸附等温线,该吸附过程属于多分子层吸附。展开更多
文摘以纳米MCM-41孔道为模版,组装制备了二溴对氯偶氮胂(DBC-ASA)纳米簇合物。采用化学分析、粉末X-射线衍射、77 K N2吸附-解吸附、红外光谱、固体扩散漫反射光谱及发光光谱表征了制备的(MCM-41)-(DBC-ASA)主-客体纳米复合材料。结果表明,DBC-ASA成功地组装在了主体MCM-41中,并且处于主体分子筛材料的纳米孔道中。(MCM-41)-(DBC-ASA)纳米复合材料具有作为发光材料的应用前景。
文摘The interaction of arsenazo Ⅲ with serum albumin and the optimum condition for the determination of protein were investigated by spectrophotometry.In a Clark—Lubs buffer solution of pH 3.0,arsenazo Ⅲ interacts with bovine serum albumin and they form a compound with an maximum absorption wavelength of 550 nm in the presence of surfactant OP.The apparent molar absorptivity of the compound is ε550nm=4.36×105L·mol-1·cm-1.Beer’s law is obeyed over 0～80mg·L-1of protein.The proteins in human serum were determined by the proposed methed with satisfactory results.
文摘In the medium of 0.60 mol/L nitric acid,chromium（Ⅵ）reacts with DBC-arsenazo to produce color-fading reaction.Chromium（Ⅵ） was determined based on this reaction.The aqqarent molar absorptivity of the method is ε520nm=2.31×105L·mol-1·cm-1.Beer’s law is obeyed over the range of 1.0-8.0μg/25mL of chromium（Ⅵ）.The method was applied to the determination of chromium in the soil samples.
