电感耦合等离子体发射光谱法测定煤矿水中钙和镁  

Determination of calcium and magnesium in coal mine water by Inductively Coupled Plasma Emission Spectrometry

作　　者：张凇慧 卢小海[1,2] 李雪梅[1,2] 谢超[1,2] 范香娟[1,2] Zhang Song-hui;Lu Xiao-hai;Li Xue-mei;Xie Chao;Fan Xiang-juan(Chongqing Key Laboratory of Exogenous Mineralization and Mine Environment,Chongqing Institute of Geology and Mineral Resources,Chongqing 400042;State Key Laboratory of Coal Resources and Safe Mining,Chongqing Research Center,Chongqing400042)

机构地区：[1]外生成矿与矿山环境重庆市重点实验室重庆地质矿产研究院,重庆400042 [2]煤炭资源与安全开采国家重点实验室重庆研究中心,重庆400042

出　　处：《江西化工》2020年第3期78-81,共4页Jiangxi Chemical Industry

摘　　要：我国煤炭开采方式以井工开采为主,且含煤地层一般在地下含水层之下,因此煤炭开采过程中会排出大量矿井水。钙、镁金属离子是煤矿水中的主要阳离子,是水质硬度形成的最重要的两种元素。行业标准MT/T202-2008中测定煤矿水中钙、镁的方法是EDTA络合滴定法、原子吸收光谱法(AAS)。本实验采用电感耦合等离子体发射光谱(ICP-AES)法同时测定煤矿水中钙和镁的含量。根据实验室质控要求,进行检出限、精密度与加标回收试验,对测定结果统计后得出钙的检出限为0.013mg/L,镁的检出限为0.005mg/L,RSD在0.2%~0.8%之间,加标回收率达到96%~105%。实验证明该方法检测快速、操作方便,检出限低,精密度高,准确度高。China’s coal mining method is dominated by underground mining,and coal-bearing strata are generally below the underground aquifer,so a large amount of mine water will be discharged during the coal mining process.Calcium and magnesium metal ions are the main cations in coal mine water,and are the two most important elements in the formation of water hardness.The industry standard MT/T202-2008 for the determination of calcium and magnesium in coal water is EDTA complexometric titration and atomic absorption spectrometry(AAS).In this experiment,the inductively coupled plasma emission spectroscopy(ICP-AES)method was used to determine the content of calcium and magnesium in coal water simultaneously.According to the laboratory quality control requirements,the detection limit,precision and spiked recovery tests were performed.After the measurement results were calculated,the calcium detection limit was 0.013 mg/L,the magnesium detection limit was 0.005 mg/L,and the RSD Between 0.2%and 0.8%,the spiked recovery rate reaches 96%to 105%.The experiment proves that the method is fast in detection,convenient in operation,low in detection limit,high in precision and high in accuracy.

关 键 词：电感耦合等离子体发射光谱法 煤矿水 钙 镁 检出限 精密度 回收率 

分 类 号：X832[环境科学与工程—环境工程] O657.31[理学—分析化学]