火焰原子吸收法测定煤渣和煤质活性炭中铁、钙、镁、锌、铅
薛慧1,董宾2
北京海光仪器有限公司,北京 100015;北京神雾环境能源科技集团股份有限公司,北京 102200
Determination of Fe, Ca, Mg, Zn and Pb in Cinder and Activated Carbon by Flame Atomic Absorption Method
薛慧1,董宾2
1. Beijing Haiguang Instrument Co., Ltd., Beijing 100015, China; 2. Beijing Shenwu Environment & Energy Technology Corp, Beijing 102200, China
摘要:建立了火焰原子吸收法测定煤渣和煤质活性炭中微量金属元素铁、钙、镁、锌、铅含量的方法。煤渣样品采用干灰化后消解,煤质活性炭样品采用稀酸提取进行处理。煤渣中铁、钙、镁元素用标准曲线法定量,活性炭中铁、锌、铅则采用标准加入法定量以减少基体干扰的影响。样品测定结果与文献报道相一致,煤渣尤其是燃烧处理后的煤渣中微量元素含量较高,而煤质活性炭通过复杂工艺处理后,微量元素大大减少。样品中被测元素的加标回收率在 88.5%~105.5%之间,测定结果的相对标准偏差小于 2% (n=7),两类样品中 6种元素的检出限分别为 0.010,0.015, 0.005,0.012,0.013,0.110 mg/L。火焰原子吸收法测定微量元素准确度高、重现性好,适合煤渣和活性炭中微量金属元素的测定。
Abstract:A method for measurement of metal microelements in cinders and activated carbon, such as Fe, Ca, Mg, Zn and Pb by flame atomic absorption method was established. Pretreatment procedure was studied. Cinders was treated with dry ashing and then digested, activated carbon was treated with acid extraction method. Metal microelements such as Fe, Ca and Mg in cinder were measured using standard curve method, while microelements such as Fe, Zn and Pb in activated carbon from coal were measured based on standard addition method, in order to reduce the interference of the basic. Results detected by the method were in accordance with existed references. Microelements contents were higher in cinders, especially after burning. In comparison, microelements dropped dramatically in activated carbon, due to the complex processing procedure. Recoveries of each element ranged from 88.5% to 105.5%, and the relative standard deviation was less than 2% (n=7). The detecting limits of the six elements were 0.010, 0.015, 0.005, 0.012, 0.013, 0.110 mg/L respectively, in two kinds of the specimen. It can be concluded that the flame atomic absorption method is accurate, convenient, it is suitable for the measurement of metal microelements in cinders and activated carbon.
关键词:火焰原子吸收法;煤渣;煤质活性炭;铁;钙;镁;锌;铅
Keywords:flame atomic absorption method; cinder; activated carbon from coal; Fe; Ca; Mg; Zn; Pb
本文引用格式:
薛慧,董宾.火焰原子吸收法测定煤渣和煤质活性炭中铁、钙、镁、锌、铅[J].化学分析计量,2014,23(4):27-30.
XUE H,DONG B .Determination of Fe,Ca,Mg,Zn and Pb in Cinder and Activated Carbon by Flame Atomic Absorption Method[J]. Chemical analysis and meterage,2014,23(4):27-30.
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