摘要
使用Amberlite CG-120离子交换树脂作为固相萃取剂,预浓缩环境水样中的Cd(Ⅱ),然后用火焰原子吸收分光光度计法(FAAS)测定洗脱液中Cd(Ⅱ)的含量从而确定水样中的Cd(Ⅱ)浓度。实验优化了洗脱液的pH、种类及其浓度、样品和洗脱液流速、吸附剂用量等实验参数,并研究了其他阳离子对Cd(Ⅱ)回收率的干扰效应,获得了最佳的分析灵敏度、准确度、精密度以及回收率。方法检出限为0.1μg/L,线性范围为0.4μg/L^80μg/L。采用该分析方法对自来水、河水、地下水、海水进行加标回收实验,回收率均在95%以上。
Amberlite CG-120 cationic exchange resin was used as solid phase extract to preconcentrated Cd(Ⅱ) in environmental water sample, and then the content of Cd(Ⅱ) in eluent was determined by flame atomic absorption spectrophotometry(FAAS) to calculate the concentration of Cd(Ⅱ) environmental in water sample. The experimental parameters such as the acid type and concentration of pH, the flow rate of sample and eluent, the amount of adsorbent and other experimental parameters were optimized. The interference effect of other cation on the recovery of Cd(Ⅱ) was studied. The optimum analytical sensitivity, accuracy, precision and recovery was obtained. The detection limit was 0.1 μg/L and the large linear range was 0.4 μg/L^80 μg/L. The recovery rate of tap water, river water, groundwater and seawater is more than 95%.
作者
周湘平
杨慧莲
吴逸渠
ZHOU Xiang-ping;YANG Hui-lian;WU Yi-qu(Guangdong Fair Harmonious Detection Co.,Ltd.,Foshan 528000,China)
出处
《广州化学》
CAS
2019年第5期36-41,共6页
Guangzhou Chemistry
