摘要
本文对单扫描示波极谱法同时测定榛蘑中的锌、铁、锰微量元素的含量进行了研究,选用0.4mol/L乙二胺—2.5×10-3mol/L三乙醇胺—0.1mol/L硫氰酸钾为底液。锌、铁、锰峰电位分别为-1.46V、-1.69V、-1.78V(υs.SCE),线性范围:0.2～1.2μg/ml Zn、0.2～1.6μg/ml Fe、0.04～0.5μg/ml Mn,锌、铁、锰的检出限分别为0.015μg/ml、0.024μg/ml、0.018μg/ml,回收率为96.6%～103.3%。此方法准确、简便、快速、灵敏度高。
A method for the determination of Zn、Fe、Mn simultaneously in a supporting solution of 0.4mol/LethyLenediamine、2.5×10-3mol/L triethanolamine and 0.1mol/L potassium thiocyanate by single sweep polarography hasbeen established. The peak potentials were -1.46Zn、-1.69V Fe、-1.78V Mn (υs.SCE). The peak heights were linearlyproportional to the concentration of iron over the range of 0.2～1.2μg/ml Zn、 0.2～1.6μg/ml Fe、0.04～0.5μg/ml Mnrespectively. The detection limits were 0.015μg/ml for Zn、 0.024μg/ml for Fe、0.018μg/ml for Mn. This method wasaccurate, simple and fast with high selectivity.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2004年第8期149-152,共4页
Food Science
