Determination of dissociative barium in barium titanate by inductively coupled plasma-atomic emission spectrometry

Inductively coupled plasma-atomic emission spectrometry(ICP-AES)was used for the deter- mination of dissociative barium content in the BaTiO_3.It was shown experimentally that when acetic acid (φ=10%)was used as solvent to dissolve sample,its dessolvability was better than HNO_3.The interference of the coexisting elements on the barium analytical line were also investigated and the re- sults show that Ti has no interference on the Ba line (233.527 nm).Acetic acid of same concentration was added into the standard solution to keep the medium consistent with the sample solution.The lin- ear equation of the calibration curve is Y=4.219 6X+0.307 3 with the linear range of 0.01～100 mg/L and detection limit of 0.004 mg/L for barium.The method has been used to determine dissocia- tive barium in the barium titanate sample,giving relative standard deviation(RSD) of 1.58% and the recovery of 96.3%-104.0%.The results were in good consistent with those obtained by EDTA titra- tion.