火焰原子吸收光谱法测定针状石油焦中钾铅镁锌铜锰  

Determination of potassium,lead,magnesium,zinc,copper and manganese in acicular petroleum coke by flame atomic absorption spectrometry

作　　者：文婧[1] 孙洪章[1] 卢静华[1] 

机构地区：[1]辽宁医学院,辽宁锦州121000

出　　处：《冶金分析》2015年第3期46-50,共5页Metallurgical Analysis

基　　金：辽宁医学院横向课题(LYHX2013001)

摘　　要：在电炉上将样品碳化至无烟后将铂坩埚置于高温炉内于750℃下灼烧约6h进行灰化,采用四硼酸锂（Li2B4O7）熔融、5%硝酸溶解,以5mL 100mg/mL镧溶液为释放剂,建立了火焰原子吸收光谱法（FAAS）测定针状石油焦样品中钾、铅、镁、锌、铜、锰的方法。实验表明,针状石油焦样品中其他元素不干扰待测元素的测定,待测元素间无相互干扰。在选定的最佳仪器条件下,钾、铅、镁、锌、铜、锰的检出限分别为0.008、0.030、0.001、0.005、0.008、0.007μg/mL。采用实验方法对2批针状石油焦样品进行测定,结果与电感耦合等离子体发射光谱法（ICP-AES）基本一致,相对标准偏差（n=10）为0.63%~3.4%,加标回收率在98%~104%之间。The sample in platinum crucible was firstly carbonized on electric stove till no smoke appeared and then burned in a high temperature furnace at 750℃ for about 6 h for ashing. With lithium tetraborate （Li2B4O7） for fusion, 5% HNO3 for dissolution and 5 mL of 100 mg/mL lanthanum solution as release agent, a flame absorption atomic emission spectrometry （FAAS） was established for determination of potassium, lead, magnesium, zinc, copper and manganese in acicular petroleum coke. It was found that oth- er elements in acicular petroleum coke didn＇t interfere with the determination, and there was no interfer- ence between testing elements. Under optimal conditions, the detection limit of potassium, lead, magnesi- um, zinc, copper, manganese was 0. 008, 0. 030, 0. 001, 0. 005, 0. 008, 0. 007 μg/mL, respectively. Two batches of acicular petroleum coke samples were determined by this proposed method, whose results were consistent with those obtained by inductively coupled plasma atomic emission spectrometry （ICP-AES）. The relative standard deviation （ n = 10 ） was 0.63%-3.4%, and the standard addition recovery was 98%- 104%.

关 键 词：火焰原子吸收光谱法(FAAS) 针状石油焦 钾 铅 镁 锌 铜 锰 

分 类 号：O657.31[理学—分析化学]