岩矿测试Issue(3)：330-334,5.DOI:10.15898/j.cnki.11-2131/td.2015.03.012
连续自动再生化学抑制－离子色谱法测定石膏及其制品中的氟和氯
Determination of Fluoride and Chloride in Gypsum and Its Products by Ion Chromatograpy with Continuous Self-regenerated Chemical Suppressor
钟坚海 1郑瑞娟 2陈金凤 3陈章捷 1张艳燕 2林亚妹 1刘明健2
作者信息
- 1. 国家矿产品检测重点实验室，福建 龙岩 364000
- 2. 龙岩出入境检验检疫局，福建 龙岩 364000
- 3. 龙岩学院化学与材料学院，福建 龙岩 364012
- 折叠
摘要
Abstract
Traditional determination of fluoride and chloride in gypsum and its products has the disadvantages of complicated pretreatment,long detection time,poor accuracy and low sensitivity.To remedy this,an ion chromatography method which can simultaneously determine the fluoride and chloride in gypsum and its products has been successfully developed.The sample was extracted firstly by ultrasonic processing and eluted by Na2 CO3-NaHCO3 .The solution was then separated by anion column and suppressed by self-electric chemistry suppressor. Finally,the solution was detected using a conductivity detector.By optimizing the pretreatment and separate conditions,the concentrations of the fluoride and chloride have good linear relationships with the peak area in the measured range with correlation coefficients of 0.9999 and 0.9998 for F - and Cl -,respectively.The proposed method yielded the detection limits of 0.15 ng/mL and 0.28 ng/mL for F - and Cl -,respectively,the recovery of 95.0% -99.7% and the RSD of less than 5% (n =8).The proposed method utilizes ultrasonic extraction and avoids purification.The pretreatment can be completed in less than 0.5 h and the loss of target analyte can be avoided.Compared with the ion selective electrode method,the detection limit of this method improves fromμg/mL to ng/mL.关键词
石膏及其制品/氟化物/氯化物/超声提取/离子色谱法Key words
gypsum and its products/fluoride/chloride/ultrasonic extraction/Ion Chromatography分类
化学化工引用本文复制引用
钟坚海,郑瑞娟,陈金凤,陈章捷,张艳燕,林亚妹,刘明健..连续自动再生化学抑制－离子色谱法测定石膏及其制品中的氟和氯[J].岩矿测试,2015,(3):330-334,5.
