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孙丽丽 《中国无机分析化学》2018,8(5):14-17
通过对观测方式、测定波长、共存元素干扰等因素进行分析和条件优化,建立了测定磷酸一铵、磷酸二铵中铊含量的碘化钾-甲基异丁基甲酮(KI-MIBK)萃取电感耦合等离子体发射光谱法。实验表明,直接采用电感耦合等离子体发射光谱法进行测定时,磷酸一铵、磷酸二铵中的锰元素对分析结果有正干扰。通过萃取分离,干扰被排除,测定结果准确、可靠。在0~1.0 mg/L范围内,铊的质量浓度与光谱强度呈良好的线性关系,相关系数达1.0000。该方法检出限为0.0072 mg/kg,相对标准偏差为4.28%(n = 10),加标回收率在97.00%~100.5%之间。 相似文献
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A new organic-inorganic hybrid sandwich-type arsenotungstate[H2dap]2H2[Ni(dap)2] [Ni(dap)2(H2O)2][Ni4(H2O)2(B-α-AsVW9O34)2]·8H2O 1 (dap = 1,2-diaminopropane) has been synthesized by the reaction of Na6[AsIII2W21O69(H2O)]·nH2O, NiCl2·6H2O and dap under hydro- thermal conditions and structurally characterized by elemental analysis, IR spectroscopy, thermo- gravimetric analysis and single-crystal X-ray diffraction. 1 crystallizes in the monoclinic space group P21/n with a = 13.5133(19), b = 19.043(3), c = 17.647(2) , β = 102.585(2)°, V = 4432.0(11) 3, T = 296(2) K, Z = 2, μ = 25.350 mm–1, GOOF = 1.058, R = 0.0353 and wR = 0.0838. The molecular unit of 1 consists of two diprotonated [H2dap]2+ cations, two protons, one four-coordinate [Ni(dap)2]2+ cation, one six-coordinate [Ni(dap)2(H2O)2]2+ cation, one classic tetra-NiII substituted sandwich-type [Ni4(H2O)2(B-α-AsVW9O34)2]10– polyoxoanion and eight lattice water molecules. Furthermore, some reported different types of transition-metal substituted sandwich-type poly- oxoanions are summarized and compared. 相似文献
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