Researches on the Stability of Porphyra-334 Solution and Its Influence Factors

查看全文 作　　者：[1]ZHANGZhaohui;[2]GAOXin;[1]YuriTashiro;[1]ShingoMatsukawa;[1]HirooOgawa

机构地区：[1]DepartmentofFoodScienceandTechnology,TokyoUniversityofMarineScienceandTechnology,Minato,Tokyo1088477,Japan;[2]DepartmentofFoodEngineering,OceanUniversityofChina,Qingdao266003,P.R.China

出　　处：《Journal of Ocean University of China》索引2004年第3卷第2期,共5页

基　　金：supported by the Natural Science Foundation of Qingdao(No.04-2-JZ-110). 摘　　要：The stability of porphyra-334 in solutions of different pH values at different temperatures was studied. In high acidic conditions, below pH 3, the absorption maximum, λ max, of porphyra-334 shows hypsochromic shift towards lower wavelength and the absorbance also has a light decrease. In high alkaline conditions of over pH 12, the absorbance of porphyra-334 decreases and an unknown compound with a peak maximum at 225 nm appears. The peak height of the unknown compound increases with the decrease of absorbance of porphyra-334. This might be related to the decomposition of porphyra-334. At room temperature, porphyra-334 solutions, except high alkaline solutions, are stable. Increasing the temperature, especially higher than 60℃, promotes the decomposition of porphyra-334 and causes the absorbance decrease both in basic and acidic solutions. 关键词：金属卟啉稳定性吸收光谱紫外线放射

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Researches on the Stability of Porphyra-334 Solution and Its Influence Factors

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