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利用F-选择性电极，首次建立了测定磷化液中广含量的有效方法。本方法简便、快速、准确；线性范围为5×10－1～5×10－6mol·L-1，回收率在（87～111）％之间。本文建立的方法可用于磷化槽中磷化液的快速调整。
Using F-selective electrodes, the first time established an effective method to determine the content of phosphating solution. The method is simple, rapid and accurate. The linear range is 5 × 10-1 ~ 5 × 10-6mol·L-1, and the recovery rate is between 87% and 111%. The method established in this paper can be used for the rapid adjustment of phosphating solution in phosphating tank.