本文以新疆土壤样品为研究对象,在碱性条件下,用硝酸镁固定样品中的氟,高温灰化除去土壤样品中的有机物,用盐酸浸提,离子缓冲溶液消除干扰离子,离子选择电极法测定新疆土壤样品中的氟。测定结果当灰化温度在550-570℃时,回收率在88.2-102%之间,当灰化温度过低或过高时土壤样品的回收率较低,实际样品的测定值也较550-570℃时的偏低。 In this paper, Xinjiang soil samples were taken as the research object. In the alkaline condition, magnesium nitrate was used to fix the fluoride in the sample, and the ashing was removed by high temperature ashing to remove the organic matters in the soil samples. The hydrochloric acid was used to extract the ions and the ion buffer solution was used to eliminate the interfering ions. Determination of fluoride in Xinjiang soil samples. Determination results When the ashing temperature is 550-570 ℃, the recovery rate is between 88.2-102%. When the ashing temperature is too low or too high, the recovery rate of soil samples is lower, and the actual samples are also measured at 550-570 ℃. 570 ℃ when the low.