采用高温水解-离子色谱法同时测定进口石油焦中氟、氯、硫和氮的含量。优化的试验条件如下：①高温燃烧温度为1 100℃；②氧气流量为500 mL·min^-1；③水蒸气蒸发量约2 mL·min^-1；④过氧化钠的用量为0.12 g。以30 mmol·L^-1氢氧化钾溶液为淋洗液，抑制型电导检测器测定。4种离子的质量浓度均在一定范围内与其对应的峰面积呈线性关系，方法的检出限（3S/N）为0.044~0.33 mg·L^-1。加标回收率为80.0%~96.0%，测定值的相对标准偏差（n=6）为2.9%~18%。

IC was applied to the simultaneous determination of fluoride, chloride, sulfur and nitrogen in imported petroleum coke with pyrohydrolysis. The optimized conditions found were as follows:① combustion temperature of high heat was 1 100℃; ② flow of oxygen was 500 mL·min^-1; ③ evaporation capacity of water vapor was about 2 mL·min^-1; ④ amount of Na₂O₂ was 0.12 g. 30 mmol·L^-1 KOH solution was used as eluant, and restraining conductance detector was used in determination. Linear relationships between values of peak area and mass concentration of the 4 ions were all kept in definite ranges, with detection limits (3S/N) of the method in the range of 0.044-0.33 mg·L^-1. Values of recovery found by standard addition method were in the range of 80.0%-96.0%, and values of RSD's (n=6) were in the range of 2.9%-18%.