用4种溶液对金、银和铂进行溶解的研究

Study on dissolving gold,silver and platinum by 4 kind solutions

在 2 5℃下 ,用 4种溶液对金、银和铂进行溶解。在金的溶解中 ,用王水和碘 /碘化钠 (I- 3/I- )溶液对金有较快的溶解速度 ,漂白粉 -HCl/NaCl溶液和Fe2 (SO4 ) 3-H2 SO4 /硫脲溶液对金的溶解速度较慢。在银的溶解中 ,只有Fe2 (SO4 ) 3-H2 SO4 /硫脲溶液对银有明显的溶解作用 ,其余 3种溶液只能缓慢溶解极少量银。 4种溶液对铂均无明显的溶解作用。

Using 4 kind solutions to dissolve gold,silver and platinum.In the dissolution of gold ,the agua regia and iodine/sodium iodide (I - 3/I -)solution have rapid dissolving speed.Using bleaching powder -HCl/NaCl solution and Fe 2(SO 4) 3-H 2SO 4 /thiourea solution to dissolve gold ,the speed is slow.Using Fe 2(SO 4) 3-H 2SO 4/thiourea solution to dissolve silver,the speed is obvious . The other three kind solutions only can dissolve small amount silver at slow speed.The four kind solutions don't have marked effects on dissolving platinum.