离子选择电极法测定硫酸生产用冷却水中氟化物

Determination of Sulfuric Acid Production with Cooling Water Fluoride by Ion Selective Electrode Method

采用离子选择电极法对硫酸生产用冷却水中氟化物进行测定，加入离子强度缓冲溶液以调节试样的pH，稳定和活化试液中氟离子的浓度，减少其对测定结果的影响。测定的线性范围为0．10～3．0mg／L，检出限为0．05mg几，加标回收率为97％~102％，相对标准偏差（n=5）为0．04％～1．12％。方法简单快捷，重现性和加标回收率好，能用于硫酸生产用冷却水中氟化物的测定。

Ion selective electrode method for the production of sulfuric acid with cooling water were measured fluoride was added to adjust the ionic strength of the buffer solution pH value of the sample, the concentration of the test solution stability and activation of fluoride ions, reducing its impact on the measurement results. Linear range of 0.10-3.0 mg/L, the detection limit is 0.05 mg/L, the recoveries were 97 %-102 % and the relative standard deviation （n=5） 0.04 %-1.12 %. The method is simple and efficient, reproducible and spike recovery is good, can be used to produce sulfuric acid with cooling water Determination of fluoride.