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    • 7. 发明申请
    • PREPARATION OF METAL COLLOIDS
    • 金属胶体的制备
    • WO2009081138A1
    • 2009-07-02
    • PCT/GB2008/004225
    • 2008-12-19
    • THE UNIVERSITY OF LINCOLNWHITE, Peter, CyrilHJORTKJAER, Jakob, Howie
    • WHITE, Peter, CyrilHJORTKJAER, Jakob, Howie
    • B01J13/00
    • G01N21/658B01J13/0043
    • A method is described for producing a silver colloid solution comprised of highly stable resulting colloids, the method comprising: adding an aqueous solution of a hydroxylamine salt to an aqueous solution of an alkali, and then dispersing into the mixture an aqueous solution of the metal ions, the hydroxylamine salt being selected such that the anion, when combined with the said metal ions, would form a metal salt having a very low solubility in water, wherein the metal ion solution is introduced into the mixture in such a manner that the metal ions are substantially dispersed throughout the mixture within one second. A maturing period, preferably at elevated temperatures, leads to a stable state in which the characteristics of the colloid undergo no further changes, and it is preferred to make and store the colloid in a polystyrene container for greatest stability. The resulting colloids from such method exhibit high light-scattering properties of small particle size and low background fluorescence levels, with a long shelf life, making it particularly suitable for Raman spectroscopy.
    • 描述了一种用于制备由高度稳定的所得胶体组成的银胶溶液的方法,所述方法包括:将羟胺盐水溶液加入到碱的水溶液中,然后将该金属离子的水溶液 选择羟胺盐使得当与所述金属离子组合时,所述阴离子将形成在水中具有非常低的溶解度的金属盐,其中所述金属离子溶液以这样的方式引入所述混合物中,使得所述金属离子 在一秒内基本上分散在整个混合物中。 成熟期,优选在升高的温度下,导致胶体的特性不再发生变化的稳定状态,并且优选将胶体制备并存储在聚苯乙烯容器中以获得最大的稳定性。 由此得到的胶体表现出较小的粒度和低背景荧光水平的光散射特性,保质期长,特别适用于拉曼光谱。