摘要
实验建立了Al-CAS-CPC-OP胶束增溶分光光度法。在pH6.55的6次甲基四胺缓冲溶液中,配合物的最大吸收波长为630nm,表观摩尔吸收系数为1.49×105L/mol·cm,Al(Ⅲ)的浓度在0～0.2μg/mL范围内符合比耳定律。利用该方法对食品中的铝含量进行测定,加标回收率为93.7%～102.0%,测定结果的相对标准偏差为2.3%～6.8%。
The aluminum content in foods was determined in the Al （Ⅲ）-CAS-CPC-OP system by micellar solubilization spectrophotometry. Simplex optimization design was carried out to create an optimal experimental condition. The Beer＇s law was obeyed in the range of 0～0.2 μg/mL for Al （Ⅲ） in medium of pH 6.55 at 630 nm, with apparent molar absorptivity of 1.49×10^5 L/mo·lcm. The method has been used to the determination of aluminum in food with the RSD of 2.3%～6.8% and the recovery of 93.7%～102.0%.
出处
《食品科技》
CAS
北大核心
2010年第10期294-296,300,共4页
Food Science and Technology
关键词
胶束增溶
分光光度法
铝
单纯形优化实验设计
micellar solubilization
spectrophotometry
aluminum
simplex optimization design
