A novel renewable liquid drop sensor was proposed for quantitative assay of thiamine based on it′s oxidation by Hg 2+ in basic medium. The dynamically growing and falling drops formed at the end of a silanized silica...A novel renewable liquid drop sensor was proposed for quantitative assay of thiamine based on it′s oxidation by Hg 2+ in basic medium. The dynamically growing and falling drops formed at the end of a silanized silica capillary tube served as the reactors for a chromogenic reaction and windowless optical cells as well. The optimum analytical conditions have been established. The sensor showed a linear response in the measuring range from 1.0×10 -4 to 5.0×10 -3 mg/mL thiamine, and with a detection limit of 8.0×10 -4 mg/mL. Besides its high sensitivity, the sensor permits a simple, fast, and inexpensive measurement with only micro-quantities reagent consumption.展开更多
An effective and fast method for assay of micro-amounts of glucose was set up. A new technique for preparation of enzyme columns based on enzyme immobilization by sol-gel was investigated. Glucose oxidase(GOD) and hor...An effective and fast method for assay of micro-amounts of glucose was set up. A new technique for preparation of enzyme columns based on enzyme immobilization by sol-gel was investigated. Glucose oxidase(GOD) and horseradish peroxidase(HRP) mixed with SiO 2 nanoparticles and polyvinyl butyral(PVB) medium were immobilized on the surface of capillary tube, respectively. The experimental results show that nanoparticles can significantly enhance the catalytic activity of immobilized enzyme. Based on GOD column and HRP column, a liquid droplet sensor was developed for the determination of glucose solution. The effect of separated columns and mixed columns on the response of glucose sensor was investigated. The sensor showed a linear response in a range of 2-400 ng/mL with a detection limit of 0.3 ng/mL under the optimum conditions. The characteristics of the sensor including effect of flow-rate, pH and temperature were discussed.展开更多
TP212.12 2004053741 一种新型颜色传感器的设计=Design on a new color sensor[刊,中]/陈家胜(南京师范大学物科院,江苏省光电技术重点实验室。江苏,南京(210097)),罗小彬…∥传感技术学报。—2003,16(4),—467-470 介绍一种采用脉冲...TP212.12 2004053741 一种新型颜色传感器的设计=Design on a new color sensor[刊,中]/陈家胜(南京师范大学物科院,江苏省光电技术重点实验室。江苏,南京(210097)),罗小彬…∥传感技术学报。—2003,16(4),—467-470 介绍一种采用脉冲光源照明。展开更多
文摘A novel renewable liquid drop sensor was proposed for quantitative assay of thiamine based on it′s oxidation by Hg 2+ in basic medium. The dynamically growing and falling drops formed at the end of a silanized silica capillary tube served as the reactors for a chromogenic reaction and windowless optical cells as well. The optimum analytical conditions have been established. The sensor showed a linear response in the measuring range from 1.0×10 -4 to 5.0×10 -3 mg/mL thiamine, and with a detection limit of 8.0×10 -4 mg/mL. Besides its high sensitivity, the sensor permits a simple, fast, and inexpensive measurement with only micro-quantities reagent consumption.
文摘An effective and fast method for assay of micro-amounts of glucose was set up. A new technique for preparation of enzyme columns based on enzyme immobilization by sol-gel was investigated. Glucose oxidase(GOD) and horseradish peroxidase(HRP) mixed with SiO 2 nanoparticles and polyvinyl butyral(PVB) medium were immobilized on the surface of capillary tube, respectively. The experimental results show that nanoparticles can significantly enhance the catalytic activity of immobilized enzyme. Based on GOD column and HRP column, a liquid droplet sensor was developed for the determination of glucose solution. The effect of separated columns and mixed columns on the response of glucose sensor was investigated. The sensor showed a linear response in a range of 2-400 ng/mL with a detection limit of 0.3 ng/mL under the optimum conditions. The characteristics of the sensor including effect of flow-rate, pH and temperature were discussed.
基金科技部"中国新加坡联合研究计划 (0 0 3/ 1 0 1 / 0 4 ) (NSTB- MOST Joint Research Program)"资助项目 (NSTB:National Science and Technology Bureau of SingaporeMOST:Ministry of Science and Technology of China.)
文摘介绍一种用于液体特性研究的新型仪器——光纤、电容液滴分析仪 (FCDA:Fiber- Capacitive Drop Analyzer)。该仪器利用光纤液滴分析技术和电容液滴分析技术制成特殊的液滴传感器 ,获取经过液滴的光强信号随液滴生长变化的规律 ,得到反映液体综合特性的“液滴指纹图”。通过对部分样品进行测试实验 ,证明液滴指纹图可以作为鉴别液体的依据 ,同时具有测量液体物理。
基金科技部"中国新加坡联合研究计划 (0 0 3/ 1 0 1 / 0 4 ) (NSTB- MOST Joint Research Program)"资助项目 (NSTB:National Science and Technology Bureau of SingaporeMOST:Ministry of Science and Technology of China.)
文摘详细介绍了光纤、电容液滴分析仪 (FCDA:Fiber- Capacitive Drop Analyzer)的系统设计方案和各组成部分的具体实现方法 ,包括液滴传感器的设计、微量供液系统的设计。
文摘TP212.12 2004053741 一种新型颜色传感器的设计=Design on a new color sensor[刊,中]/陈家胜(南京师范大学物科院,江苏省光电技术重点实验室。江苏,南京(210097)),罗小彬…∥传感技术学报。—2003,16(4),—467-470 介绍一种采用脉冲光源照明。
