【摘 要】
：
A new fluorescence quenching method has been developed for the determination of platinum in nonionic mieroemulsion medium.This method is based on the fact that
【机 构】
：
School of Chemistry and Chemical Engineering,School of Life Science
论文部分内容阅读
A new fluorescence quenching method has been developed for the determination of platinum in nonionic mieroemulsion medium.This method is based on the fact that platinum can form a stable chelate with dibromohydroxyphenyl-fluorine (DBHPF) when they are in the molar ratio of 1:2 in the nonionic microemulsion medium.Under optimum conditions,the system,having the maximum excitation and emission wavelengths at 468 nm and 532 nm,respectively,shows constant fluorescence intensity in the pH range of 3.5-4.0 and high selectivity and sensitivity as well as low interference from foreign ions.Furthermore,this fluorescence intensity is a linear function of Pt(Ⅳ) concentration in the range of 0.002-1.00 μg·mL-1 and the limit of detection is 2.90 ng·mL-1.
其他文献
The on-line diameter measurement of larger axis workpieces is hard to achieve high precision detection, because of the bad environment of locale, the problem to
Background In early April 2009,cases of human infection with 2009 pandemic influenza A (H1N 1) virus were identified in Mexico.The virus then spread rapidly to
Dextral-slip thrust movement of the Songpan-Garze terrain over the Sichuan block caused the Ms 8.0 Wenchuan earthquake of May 12, 2008 and offset the Central Lo
A greenhouse experiment was conducted to test and compare the suitability of saline compost and saline irrigation water for nutrient status amendment of a sligh
介绍了一种电荷载流子倍增寄存器(CCM)电极间隙的传输线模型,通过求解其波动方程得到了电荷载流子倍增寄存器电极间隙的电势分布及电场分布。模拟分析表明:电荷载流子倍增寄
In this paper, the characteristics of forces in active control systems connected to adjacent levels of a building are analyzed. The following characteristics ar
There were huge life and property losses during the Ms8.0 Wenchuan earthquake on May 12, 2008. Strain fluctuation curves were completely recorded at stress obse
The east-west location change of the East Asian westerly jet (EAWJ) at 200 hPa during Meiyu and the associated spatial distribution variation of precipitation i
流注的产生和传播是空气间隙击穿中一个重要的物理过程，研究低气压下流注的产生和传播过程有助于理解空气间隙的击穿放电，对高海拔地区输电线路及输变电设备的设计和运行有着重
In the North China Plain,fertilizer management and tillage practices have been changing rapidly during the last three decades; however,the influences of long-te