摘要
用线性扫描吸附伏安法研究了Ｔｒｉｓ－醋酸底液中（ｐＨ８．７），食用色素苋菜红，胭脂红在悬汞电极上的伏安特性，两色素分别在－０．５１Ｖ和－０．６７Ｖ（ｖｓ．ＳＣＥ）产生强吸附还原峰，导数峰电流与其浓度分别在５．０×１０（－１０）～５．０×１０（－７）及５．０×１０（－９）～１．０×１０（－７）ｍｏｌ／Ｌ范围内呈良好线性关系，本法可不经分离直接测定食品、药物胶囊中两色素各自的含量．
The behaviour of the amaranth and carmine,at a hanging mercury electrode,has been investigated in Tris-HAc solution(pH8. 7)by using linear potential sweep voltammetry. The peak potential were obtained at - 0. 51 V(SCE)for 5. 0 × 10￣(-1) ～ 5. 0 × 10￣(-7) and 5. 0 ×10￣(-9) ～ 1. 0 × 10￣(-7) mol/L carmine. The derivative peak currents were directly proportional to the concentration of amaranth and carmine over the range of 5. 0 × 10￣(-10) ～ 5. 0 × 10￣(-7)and 5. 0 × 10￣(-9) ～ 1. 0 × 10￣(-7)mol/L respectively. this method can be used for the determination of amaranth and carmine in food or some tablets coating without deseparation.
出处
《山东大学学报（自然科学版）》
CSCD
1994年第1期75-78,共4页
Journal of Shandong University(Natural Science Edition)
关键词
吸附伏安法
苋菜红
胭脂红
食品
second derivative voltammetry
amaranth
carmine
