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报道了基于2,4_二羟基苯甲醛缩硫脲合汞(Ⅱ)为载体的溶剂聚合膜阴离子敏感电极,该电极对碘离子(I-)具有高的电位选择性和灵敏度,且呈现反Hofmeister选择性行为,其选择性序列为I->Sal->SCN->-4ClO>Br->-2NO>3-NO>32-SO>Cl->2-4SO。该电极电位对碘离子呈近能斯特响应,其线性范围为2.0×10-6～1.0×10-1mol/L,斜率为-68.6mV/dec,检出限为6.0×10-7mol/L。将电极用于加碘盐中碘含量的测定,结果令人满意。
A solvent-polymerized membrane anion-sensitive electrode based on 2,4-dihydroxybenzaldehyde thiourea (Ⅱ) as carrier has been reported, which has high potential selectivity and sensitivity to iodide (I-) Hofmeister selective behavior, the selective sequence is I-> Sal-> SCN-> -4ClO> Br-> -2NO> 3-NO> 32-SO> Cl-> 2-4SO. The potential of the electrode showed a near-Nernst response to iodide ions with a linear range of 2.0 × 10-6 ~ 1.0 × 10-1mol / L and a slope of -68.6mV / dec with a detection limit of 6.0 × 10-7mol / L . The electrode was used for iodine salt iodine content determination, the results are satisfactory.