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铀(IV)在0.5—1.4 mol/l盐酸中,用氯化十四烷基吡啶(简称TPC)作增溶剂,铀(IV)与偶氮氯膦6,8-萘二磺酸(简称偶氮氯膦G)-TPC形成的三元络合物具有极高的灵敏度(ε_(705nm)=1.6×10~5l·mol~(-1)·cm~(-1)和较好的选择性。从而建立了用P_(350)-DA_(201)树脂柱层析分离,在pH1.6—4.5的铁(II)-EDTA体系中还原铀(VI),以偶氮氯磷6,8一萘二磺酸显色,TPC增溶光度法测定矿石中的铀。当矿样中铀量为5×10~(-4)%时,相对标准偏差为±11.4%。
Uranium (IV) with 0.5-1.4 mol / l hydrochloric acid, with tetrachloropyridinium chloride (referred to as TPC) as a solubilizer, uranium (IV) and chlorophosphonazo 6,8-naphthalene disulfonic acid The ternary complex formed by chlorophosphonazo (G) -TPC has very high sensitivity (ε 705nm) = 1.6 × 10-5 mol · cm -1 and better selectivity Thus, the column chromatography with P_ (350) -DA_ (201) was established to reduce uranium (VI) in the iron (II) -EDTA system at pH1.6-4.5, Naphthalene disulfonic acid and TPC spectrophotometric method for the determination of uranium in ore.When the amount of uranium in the ore sample is 5 × 10 ~ (-4)%, the relative standard deviation is ± 11.4%.