胭脂红酸测定方法及稳定性研究.pdfVIP

※分析检测 食品科学 2007, Vol. 28, No. 08 321 张建云，李志国 * ，赵杰军，杨时宇，包松莲 (中国林业科学研究院资源昆虫研究所，云南 昆明 650224) ：对胭脂虫中胭脂红酸测定方法及稳定性研究表明：用标准曲线法与FCC标准法测定胭脂红酸的结果一致。 在遮光、室内散射光、温度20～90℃、pH6～8、不同浓度的盐酸、氧化剂H2 O2 、低浓度的还原剂Na2 SO3 胭 脂红酸液是稳定的，而pH4～5 和9～11 胭脂红酸溶液相对稳定，在日光、白炽灯、不同浓度的氢氧化钠、高浓 2+ 2+ + 2+ 度的还原剂Na2SO3 胭脂红酸溶液是不稳定的；添加 Cu 、Mg 、K 的不同浓度对胭脂红酸溶液是稳定的；Zn 、 Ca2+ 3+ 的不同浓度对胭脂红酸溶液相对稳定；Fe 72h 出现黑色沉淀，呈不稳定状态。 ：胭脂虫；胭脂红酸；测定方法；稳定性 Study on Stability and Determination Methods of Carminic Acid Extracted from Dactylopius coccus Costa ZHANG Jian-yun，LI Zhi-guo*，ZHAO Jie-jun，YANG Shi-yu，BAO Song-lian (Research Institute of Resource Insects, Chinese Academy of Forestry, Kunming 650224, China) Abstract ：In this paper, the determining means and stabilities of carminic acid extracted from Dactylopius cossus Costa were studied in different conditions. The results showed that the carminic acid can be determined by means of standard curve (SCM) consistent with the means of the FCC (Food Chemicals Codex) standard (the means of formula, FM). Carminic acid is stable under conditions of darkness and indoor scattered rays, temperature range 20～90 ℃, oxidizer different concentrations of H2O2, different 2+ 2+ + HCl concentrations, and low consistency reducer Na2SO3. Adding Cu , Mg and K , it is relative stable under either pH4～5 2+ 2+ and 9～11 or different concentrations of Zn and Ca . It is unstabe in sunshine, in