摘要
在CH3COOH-CH3COONa底液中,用阳极溶出方波伏安法同时测定竹叶提取物中铜、铅、镉3种元素含量,该法的最佳条件为:控制CH3COOH-CH3COONa缓冲溶液的pH=4 5,且c(CH3COONa)=0 12mol/L;选择方波频率为30Hz,电位扫描速度为4mV/s,在-0 8V处富集240s后采用方波伏安法正向扫描至0 15V。当铜、铅、镉金属离子的质量浓度为0 05～30μg/L时,线性关系较好,相关系数分别为0 9985,0 9992和0 9985,加标回收率分别为101 6%,99 0%和101 0%。
Simultaneous determination of copper,lead,and cadmium in extract of bamboo leaf by anodic stripping square wave voltammetry in CH3COOH-CH3COONa buffer solution was studied.The optimum conditions are found to be 012 mol/L CH3COONa and a pH of about 45.The following parameters governing electrodeposition and stripping are selected:square wave frequency 30 Hz,scan rate 4 mV/s,deposition potential -08 V and quit time 240 s.There are linear calibrations for trace determination of copper,lead,and cadmium in the range of 005-30 μg/L,and the recoveries of standard addition are 1016%,990% and 1010% respectively.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2003年第10期625-627,共3页
Fine Chemicals
关键词
铜
铅
镉
阳极溶出方波伏安法
copper
lead
cadmium
anodic stripping square wave voltammetry
