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自古以来,人们都知道王水是溶解黄金最好的溶剂。在本刊1986年第3期杨丙雨的文章中,综述了各种溶剂对金的腐蚀速率,其中王水名列榜首,为129600mdd(毫克·分米~(-2)·日~(-1)),即一块表面积为1平方分米(即100平方厘米) 的黄金投入浓王水中,在室温时1日内能溶解掉129.6克黄金。可是在985年的西德专利(DE 342446A_1)中透露,以Br_2和NaCl(或NaOH、NaBr,NH_4Cl等)组成的试剂,对金有很强的溶解能力,其中由Br_2(v/v)1％-NaCl(w/v)10％(pH=3.4)组成的溶剂,在17℃时溶解黄金的能力达256毫克·厘米~(-2)·小时~(-1),相当于614400mdd,约为浓王水的5倍。
Since ancient times, it is known that aqua regia is the best solvent for dissolving gold. The corrosion rate of gold to various solvents was reviewed in the article Yang Yangyu, Issue 3, 1986, in which aqua regia topped the list with 129600mdd (mg · dm -2 day -1) ), That is, a piece of gold with a surface area of 1 square decimeter (ie, 100 cm 2) is put into concentrated aqua regia to dissolve 129.6 grams of gold within 1 day at room temperature. However, in the 985 West German patent (DE 342446A_1), it is revealed that the reagent composed of Br 2 and NaCl (or NaOH, NaBr, NH 4 Cl and the like) has a strong ability to dissolve gold, of which Br 2 (v / v) % - NaCl (w / v) 10% (pH = 3.4), the ability to dissolve gold reaches 256 mg · cm -2 · hr -1 at 17 ° C, corresponding to 614400 mdd Concentrated aqua 5 times.