摘要
建立测定土壤中氟化物的离子色谱法。在0.1000 g土壤样品中加入0.800 g氢氧化钠和1 mL去离子水,于220℃下密闭熔融土壤样品6 h,采用Ion Pac AS19型离子色谱柱,以20 mmol/L氢氧化钾溶液为淋洗液,利用离子色谱法测定土壤中的氟化物含量。氟离子质量浓度在0~10 mg/L范围内与色谱峰面积线性关系良好,相关系数为0.9998,方法检出限为2.5 mg/kg。氟化物测定结果的相对标准偏差为1.49%~5.53%(n=7)。采用所建方法对标准物质GBW 07446、GBW 07388和GBW 07407进行测定,测定值与标准值的相对误差为1.09%~1.83%。该方法具有高效率、低危险、低污染、低成本的特点,适用于土壤样品中氟化物的测定。
A method of ion chromatography was established to determine fluoride in soil.0.800 g sodium hydroxide and 1 mL deionized water was added into 0.1000 g of soil sample,the soil sample was melt under closed condition at 220℃for 6 h,and fluoride was detected by ion chromatography with Ion Pac AS19 cloumn and 20 mmol/L sodium hydroxide solution as the eluent.The mass concentration of fluoride ion had a good linear relation with chromatographic peak area in the range of 0–10 mg/L,the correlation coefficient was 0.9998,and the detection limit was 2.5 mg/kg.The relative standard deviation of the detection results of fluoride was 1.49%–5.53%(n=7).The established method was used to determine the reference materials GBW 07446,GBW 07388 and GBW 07407,the relative error between the measured value and the standard value was 1.09%–1.83%.This method has the advantages of high efficiency,low danger,less pollution and low cost,which is suitable for the determination of fluoride in soil samples.
作者
毕建玲
徐标
孙鹏飞
高玉花
王飞飞
邵长伟
BI Jianling;XU Biao;SUN Pengfei;GAO Yuhua;WANG Feifei;SHAO Changwei(Shandong Institute of Geophysical and Geochemical Exploration,Jinan 250013,China;Shandong Provincial Eco–environment Monitoring Center,Jinan 250101,China)
出处
《化学分析计量》
CAS
2022年第6期27-31,共5页
Chemical Analysis And Meterage
