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在岩石-地球化学和矿物研究工作中,有时需要把有碍于矿物鉴定的铁,锰氧化物和氢氧化物从光片或薄片上除去.其方法是:于40～50毫升1%的羟氧溶液中,加入稀释至1∶3的硫酸3～4毫升,再加约O.2克抗坏血酸.以上试剂用Mn~(4+)和Fe~(3+)于常温下还原后移入烧杯中,要使直立于其中的未加盖玻璃的磨片全部被液体淹没.持续7～8分钟后肉眼可以见到明显的去色现象,将磨片用水流小心冲洗.去色时间太长或羟氧浓度过大,效果并不会好,原因是方解石、白云石和菱锰矿之类的矿物常受到破坏,而对针铁矿、赤
In rock-geochemical and mineral research work, it is sometimes necessary to remove iron, manganese oxides and hydroxides that are detrimental to mineral identification by removing light or flakes from 40 to 50 ml of 1% Oxygen solution, adding 3 to 4 ml of sulfuric acid diluted to 1: 3, and adding about 0.2 g of ascorbic acid to the above reagent with Mn ~ (4+) and Fe ~ (3+) at room temperature and then transferred into a beaker , So that upright in which uncoated glass grinding all submerged liquid for 7 to 8 minutes after the naked eye can see a significant color to the phenomenon of the abrasive tablets with water flow carefully washed to the color time is too long or hydroxyl Oxygen concentration is too large, the effect will not be good, because calcite, dolomite and rhodochrosite and other minerals are often destroyed, and goethite, red