A new highly sensitive solid substrate room temperature phosphorimetry for the determination of trace titanium is proposed based on the sensitization of Triton X-100 to the SS-RTP intensity of 4,5-dibromophenylfluoron...A new highly sensitive solid substrate room temperature phosphorimetry for the determination of trace titanium is proposed based on the sensitization of Triton X-100 to the SS-RTP intensity of 4,5-dibromophenylfluorone-titanium complex adsorbed on the filter paper substrate modified by gelatin. When Triton X-100 was added into the luminescence system, the RTP intensity was raised 3 times stronger than that of the system without Triton X-100. The linear dynamic range of the new method is 0 64~3 2 fg/spot(0 4 μL) with a detection limit of 12 8 ag/spot, and the regression equation of the working curve is Δ I p =482 0+119 5 m Ti(Ⅳ) (fg/spot), the correlation coefficient r =0 9992, n =6. The phosphorescence lifetime( τ =0 85 ms) was also determined. The recoveries(and RSD) for the determinations of titanium in human hair and tea samples were 101 0%(3 0%) and 99 97%(4 2%), respectively.展开更多
A new method for the determination of trace calcium by solid substrate-room temperature phosphorimetry is established. It is based on the fact that chromeazurols azurol S-phenanthroline-NaCMC (CAS-phen-NaCMC) system c...A new method for the determination of trace calcium by solid substrate-room temperature phosphorimetry is established. It is based on the fact that chromeazurols azurol S-phenanthroline-NaCMC (CAS-phen-NaCMC) system can emit strong and stable room temperature phosphorescence (RTP) on the solid substrate in the filter paper. Ca(2+) and phenanthroline can form complex ion Ca(phen)3(2+), which will form complex [Ca(phen)3(CAS)2] with CAS. In the result, the number of CAS molecules in each spot increased, causing sharp increase of the RTP signal of the CAS-phen-NaCMC system.展开更多
在外重原子微扰剂Pb(Ac)2存在下,基于罗丹明6 G(Rhodamine 6G,简写为R)的SiO2纳米微球(简写为R-SiO2)在醋酸纤维素膜(ACM)上于λex/λem=482.38/648.59 nm处能发射强而稳定的室温燐光信号.由该发光微球标记的麦胚凝集素(Triticum vulgar...在外重原子微扰剂Pb(Ac)2存在下,基于罗丹明6 G(Rhodamine 6G,简写为R)的SiO2纳米微球(简写为R-SiO2)在醋酸纤维素膜(ACM)上于λex/λem=482.38/648.59 nm处能发射强而稳定的室温燐光信号.由该发光微球标记的麦胚凝集素(Triticum vulgare lectin简称WGA),不仅仍能在ACM上与碱性磷酸酶(AP)发生定量的特异性亲和吸附反应,且亲和吸附反应产物能发射更强的室温燐光(RTP)信号,据此建立了R-SiO2纳米微球标记凝集素(WGA)亲和吸附(AA)固体基质室温燐光法(AA-SS-RTP)测定AP的一种新方法.本法的线性范围为1.00～360.00 ag AP spot-1(样品体积0.4μL/斑,对应浓度2.50～900.00fg/ml)),工作曲线的回归方程为△Ip=16.24+0.8856 m AP/ag spot-1,r=0.9993.检出限为0.14ag spot-1.分别对1.00和360.00 ag spot-1 AP重复测定11次,RSD为3.9%和3.1.%.本方法灵敏、准确、精密度好,已成功用于人血清中AP的测定.展开更多
本研究根据布美他尼(BMTN)抑制Fe3+与桑色素(R)生成络合物[Fe-morin]3+([FeR]3+)而导致体系的室温磷光信号显著猝灭进行的.依据抑制[Fe-桑色素]3+络合物形成效应、BMTN含量与△Ip的线性关系、发展了一种新的测定BMTN的抑制络合反应固体...本研究根据布美他尼(BMTN)抑制Fe3+与桑色素(R)生成络合物[Fe-morin]3+([FeR]3+)而导致体系的室温磷光信号显著猝灭进行的.依据抑制[Fe-桑色素]3+络合物形成效应、BMTN含量与△Ip的线性关系、发展了一种新的测定BMTN的抑制络合反应固体基质室温磷光法(SS-RTP).本方法的检出限为5.0 ag spot-1(对应浓度1.2×10-14 g ml-1),线性范围为0.040-4.0 pg ml-1,显示了高的灵敏度与宽的线性范围,用于人体尿液中BMTN的测定,结果与UV相吻合.同时,用摩尔比法、等摩尔比连续变化法和红外光谱确定络合物的组成为[FeR]3+。展开更多
A Triton X-100-4.0G-D （4.0G-D refers to a 4.0-generation dendrimer） was brought forward as a new phosphorescence labeling reagent. Two types of specific affinity adsorption （AA） reactions （direct method and sandw...A Triton X-100-4.0G-D （4.0G-D refers to a 4.0-generation dendrimer） was brought forward as a new phosphorescence labeling reagent. Two types of specific affinity adsorption （AA） reactions （direct method and sandwich method） were carried out between the labeling product of Triton X-100-4：0G-D-Wheat germ agglutinin （WGA） and alkaline phosphatase （ALP）, the product of AA reaction preserved the good characteristics of room temperature phosphorescence （RTP） of 4.0G-D and △Ip of the product was proportional to the content of ALP. According to the fact stated above, a new method for the determination of trace ALP by affinity adsorption solid substrate-room temperature phosphorimetry （AA-SS-RTP） was established on the basis of WGA labeled with the Triton X-100-4.0G-D. The detection limits were 0.20 ag·spot^-1 （corresponding concentration： 5.0×10^-16 g·mL^-1, namely 5.0×10^-18 mol·L^-1） for a direct method and 0.14 ag·spot^-1 （corresponding concentration： 3.5×10^-16 g·mL^-1, namely 3.5×10^-18 mol·L^-1） for a sandwich method, respectively. For their high sensitivity, good repeatability and high accuracy, the direct method and sandwich method have been successfully appfied to determine the content of ALP in human serum, and the results were coincided with the clinical detection results of the enzyme-linked immunosorbent assay method by the Zhangzhou Hospital of Traditional Chinese Medicine. Meanwhile, the mechanism for the determination of trace ALP by AA-SS-RTP was discussed.展开更多
基金Supported by the National Natural Science Foundation of China( No.2 0 175 0 11) and the Natural Science Foundation ofFujian Province( No.C0 110 0 2 8)
文摘A new highly sensitive solid substrate room temperature phosphorimetry for the determination of trace titanium is proposed based on the sensitization of Triton X-100 to the SS-RTP intensity of 4,5-dibromophenylfluorone-titanium complex adsorbed on the filter paper substrate modified by gelatin. When Triton X-100 was added into the luminescence system, the RTP intensity was raised 3 times stronger than that of the system without Triton X-100. The linear dynamic range of the new method is 0 64~3 2 fg/spot(0 4 μL) with a detection limit of 12 8 ag/spot, and the regression equation of the working curve is Δ I p =482 0+119 5 m Ti(Ⅳ) (fg/spot), the correlation coefficient r =0 9992, n =6. The phosphorescence lifetime( τ =0 85 ms) was also determined. The recoveries(and RSD) for the determinations of titanium in human hair and tea samples were 101 0%(3 0%) and 99 97%(4 2%), respectively.
文摘A new method for the determination of trace calcium by solid substrate-room temperature phosphorimetry is established. It is based on the fact that chromeazurols azurol S-phenanthroline-NaCMC (CAS-phen-NaCMC) system can emit strong and stable room temperature phosphorescence (RTP) on the solid substrate in the filter paper. Ca(2+) and phenanthroline can form complex ion Ca(phen)3(2+), which will form complex [Ca(phen)3(CAS)2] with CAS. In the result, the number of CAS molecules in each spot increased, causing sharp increase of the RTP signal of the CAS-phen-NaCMC system.
文摘在外重原子微扰剂Pb(Ac)2存在下,基于罗丹明6 G(Rhodamine 6G,简写为R)的SiO2纳米微球(简写为R-SiO2)在醋酸纤维素膜(ACM)上于λex/λem=482.38/648.59 nm处能发射强而稳定的室温燐光信号.由该发光微球标记的麦胚凝集素(Triticum vulgare lectin简称WGA),不仅仍能在ACM上与碱性磷酸酶(AP)发生定量的特异性亲和吸附反应,且亲和吸附反应产物能发射更强的室温燐光(RTP)信号,据此建立了R-SiO2纳米微球标记凝集素(WGA)亲和吸附(AA)固体基质室温燐光法(AA-SS-RTP)测定AP的一种新方法.本法的线性范围为1.00～360.00 ag AP spot-1(样品体积0.4μL/斑,对应浓度2.50～900.00fg/ml)),工作曲线的回归方程为△Ip=16.24+0.8856 m AP/ag spot-1,r=0.9993.检出限为0.14ag spot-1.分别对1.00和360.00 ag spot-1 AP重复测定11次,RSD为3.9%和3.1.%.本方法灵敏、准确、精密度好,已成功用于人血清中AP的测定.
文摘本研究根据布美他尼(BMTN)抑制Fe3+与桑色素(R)生成络合物[Fe-morin]3+([FeR]3+)而导致体系的室温磷光信号显著猝灭进行的.依据抑制[Fe-桑色素]3+络合物形成效应、BMTN含量与△Ip的线性关系、发展了一种新的测定BMTN的抑制络合反应固体基质室温磷光法(SS-RTP).本方法的检出限为5.0 ag spot-1(对应浓度1.2×10-14 g ml-1),线性范围为0.040-4.0 pg ml-1,显示了高的灵敏度与宽的线性范围,用于人体尿液中BMTN的测定,结果与UV相吻合.同时,用摩尔比法、等摩尔比连续变化法和红外光谱确定络合物的组成为[FeR]3+。
基金Project supported by Fujian Province Natural Science Foundation （Nos. C0510028, D0510027, 2006J0386）.
文摘A Triton X-100-4.0G-D （4.0G-D refers to a 4.0-generation dendrimer） was brought forward as a new phosphorescence labeling reagent. Two types of specific affinity adsorption （AA） reactions （direct method and sandwich method） were carried out between the labeling product of Triton X-100-4：0G-D-Wheat germ agglutinin （WGA） and alkaline phosphatase （ALP）, the product of AA reaction preserved the good characteristics of room temperature phosphorescence （RTP） of 4.0G-D and △Ip of the product was proportional to the content of ALP. According to the fact stated above, a new method for the determination of trace ALP by affinity adsorption solid substrate-room temperature phosphorimetry （AA-SS-RTP） was established on the basis of WGA labeled with the Triton X-100-4.0G-D. The detection limits were 0.20 ag·spot^-1 （corresponding concentration： 5.0×10^-16 g·mL^-1, namely 5.0×10^-18 mol·L^-1） for a direct method and 0.14 ag·spot^-1 （corresponding concentration： 3.5×10^-16 g·mL^-1, namely 3.5×10^-18 mol·L^-1） for a sandwich method, respectively. For their high sensitivity, good repeatability and high accuracy, the direct method and sandwich method have been successfully appfied to determine the content of ALP in human serum, and the results were coincided with the clinical detection results of the enzyme-linked immunosorbent assay method by the Zhangzhou Hospital of Traditional Chinese Medicine. Meanwhile, the mechanism for the determination of trace ALP by AA-SS-RTP was discussed.
