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本文报道宁在A1660型示波极谱仪上,采用差示导数示波极谱法,首次使用碳粉-氯化钾-琼胶作为盐桥,外接饱和甘汞电极,以异丙醇-铜铁灵-乙酸-乙酸铵-氨三乙酸组分为底液,直接测定有机相(膦类或胺类萃取剂)中的铀。本方法简易快速,取样量少,无需破坏有机相并省略反萃及除氧手续。铀的峰电位为—0.28伏特(相对饱和甘汞电极),铀浓度在2.0～10.0微克/毫升范围与波高呈线性关系。实测样品的相对标偏(测定次数n=6)为±5％,回收率为96～104％。
This article reports rather on the A1660 oscilloscope polarography, the use of differential derivative oscillopolarography, the first use of toner - potassium chloride - agar as a salt bridge, external saturated calomel electrode, isopropanol - copper Triterpene - acetic acid - ammonium acetate - nitrilotriacetic acid component of the bottom liquid, direct determination of organic phase (phosphine or amine extractant) of uranium. The method is simple, fast, less sampling, without destroying organic phase and omitting stripping and deoxygenation procedures. The peak potential of uranium is -0.28 volts (relative to a saturated calomel electrode) and the uranium concentration is linearly related to the wave height in the range of 2.0 to 10.0 μg / ml. The relative standard deviation (measured n = 6) of the measured sample was ± 5% and the recovery was 96 ~ 104%.