摘要
采用双柱富集的流动注射在线预富集系统与220FS顺序多元素原子吸收分光光度计联用,使用圆锥型活性炭微柱为预富集柱,在pH 4~5.5范围内,以吡咯啶二硫代氨基甲酸铵(APDC)为络合剂,6mol/L HNO3为洗脱剂,实现了Cu、Co、Ni 、Cd、 Pb 5种元素的快速顺序测定.该体系对以上5种元素的富集倍数为9.8~15.5之间, 34 s富集的检出限(3σ)Cu为1.81,Co为3.10,Ni为1.66,Cd为0.28,Pb为4.90 μg/L;相对标准偏差Cu 1.13%;Co 1.24%;Ni 2.26%;Cd 0.95%;Pb 1.77%.
Five elements such as Cu, Co, Ni, Cd and Pb were fastly determined sequentially for the first time by using a double per-columns on-line flow injection preconcentration system together with 220FS sequential multi elemental atomic absorption spectrophotometer, which a conical minicolumn packed with activated carbon was used as a preconcentration column, ammonium pyrrolidinedinedithiocarbamate (APDC) as a complexing agent, and 6 mol/L nitric acid as an eluant. The enrichment factors between 9. 8 similar to 15. 7 for the above elements were obtained in this system, and the detection limits( 3 sigma-) obtained with 34 s enrichment for Cu, Co, Ni, Cd and Pb were 1. 81 3. 10,1. 66,0. 28,4. 90 mu g/L, respectively. The relative standard deviation for Cu, Co Ni, Cd and Pb were 1. 13% 1.24% 2.26%,0.95% 1.77%, respectively.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2005年第3期385-388,共4页
Chinese Journal of Analytical Chemistry
关键词
预富集
微柱
NI2
流动注射
火焰原子吸收
吡咯
双柱
FS
元素
原子吸收分光光度计
flow injection analysis
flame atomic absorption spectrometry
activated carbon
amonium pyrrolidinedithiocarba mate
copper
cobalt
nickel
cadmium
lead