| 摘要 |
PURPOSE: To obtain a colloidal gold soln. excellent, in shelf stability and maintaining stability even after freezing or the addition of an electrolyte. CONSTITUTION: An aq. gold salt soln. is reduced with citric acid, its salt, ascorbic acid or its salt and a nonionic surfactant having polyoxyethylene chains and HLB(hydrophile-lipophile balance) of >=12 is incorporated to produce the objective colloidal gold soln. The average polymn. degree (mol) of the polyoxyethylene chains is >=10. |
