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在含有40%乙醇的缓冲溶液(pH=3.5)中,以 BaCl_2为滴定剂,钡离子选择电极为指示电极,直接滴定对氯苯磺酸中的 SO_4~(2-),Ca~(2+)的干扰可用1%乙二胺四乙酸(EDTA)溶液消除.
In the buffer solution containing 40% ethanol (pH = 3.5), BaCl_2 titrant and barium ion selective electrode were used as directing electrodes to directly titrate SO42-, Ca2 + ) Interference can be 1% ethylenediaminetetraacetic acid (EDTA) solution to eliminate.