(Table 3, page 78) Element composition versus depth of layers inside manganes...

Before analysis the samples were digested in HF and evaporated from a HClO4-HNO 3 mixture. The residue was dissolved in 50 ml of 1N HCl.From 1983 until 1989 NOAA-NCEI compiled...分析前，样品先经氢氟酸（Hydrofluoric Acid, HF）消解，再于高氯酸-硝酸（Perchloric Acid-Nitric Acid, HClO4-HNO3）混合体系中蒸干。所得残渣用50毫升1当量浓度的盐酸（1N HCl）溶解。1983年至1989年间，美国国家海洋和大气管理局国家环境信息中心（National Oceanic and Atmospheric Administration National Centers for Environmental Information, NOAA-NCEI）开展了相关汇编工作。