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本文报导了以玻碳电极为基体的１：１２硅钼杂多阴离子薄膜化学修铈电极的制备及其电化学特性。并应用于导数伏安法测定。在４．０×１０￣（－３）ｍ０ｌ／Ｌ（ＮＨ＿４）＿６ＭＯ＿７Ｏ＿（２４）－６．８×１０￣（－２）ｍｏｌ／ＬＮａ＿３Ｃｉｔ－０．４８ｍｏｌ／ＬＮＨＯ＿３体系中，硅浓度在８．３×１０￣（－７）～１．７×１０￣（－３）ｍｏｌ／Ｌ范围内与峰电流呈良好线性关系，检测限为８．０×１０￣（－７）ｍｏｌ／Ｌ。对可溶性硅（以ＳｉＯ＿２计）为２４５．０５ｍｇ／Ｌ的黑液，稀释１０倍后，取２．００ｍＬ平行测定９次，ＲＳＤ为０．５８％，加标回收率在９７．３％～１０４．４％间。
In this paper, the preparation and electrochemical characterization of a cerium-doped 1: 12 silico-molybdenum heteropolyanion thin film modified with a glassy carbon electrode was reported. And applied to the determination of derivative voltammetry. In the system of 4.0 × 10 ~ (-3) m0l / L (NH_4) _6MO_7O_ (24) -6.8 × 10 ~ (-2) mol / LNa_3Cit-0.48mol / LNHO_3, The linear range was 10 ~ (-7) ~ 1.7 × 10 ~ (-3) mol / L with peak current. The detection limit was 8.0 × 10 ~ (-7) mol / L. Soluble silica (calculated as SiO_2) was 245.05mg / L black liquor, diluted 10 times, taken 2.00mL parallel determination of 9 times, RSD 0.58%, the recovery was 97.3% to 104 .4% room.