Objective A method for the determination of fluoride ion incoalmine water was established by ion chromatography. Methods The watersamples were determined by ${0.22\mu}\mathrm{m}$ qeuosystem filter membrane with a volume of ${25\mu }\mathrm{L}$ . In ion chromatograpy,the determination of fluoride was completed within $4\mathrm{\;{min}}$ under the anionexchange chromatography of HS-5A-P3 with column temperature at ${35}^{\circ }\mathrm{C}$ , eluted with ${20}\mathrm{{mmol}}/\mathrm{L}\mathrm{{KOH}}$ solution at the rate of ${1.0}\mathrm{\;{mL}}/\mathrm{{min}}$ . Results The linear relation between peak area and concentration offluoride were good. The linear return equation was $\mathrm{y}= {30.26}\mathrm{x}- {0.104}$ .The correlation coefficient of the standard curve was above 0.9997 . Thedetection limit was ${0.002}\mathrm{{mg}}/\mathrm{L}$ . Therecovery of fluoride was ${88.0}\%$ -115.5%. The mean value offluorine ion content in the standard sample was within the range of itsguaranteed concentration. Conclusion Compared fluoride ion selectiveelectrode method, the method has the advantages of small sample amountand can be used to determine other components simultaneously. It issuitable for the determination of fluorine ion content in largequantities of coal mine water.

ion chromatograpy  /  fluoride  /  coalmine water