摘要
色氨酸是废水中一种常见的标志性污染物。采用荧光光谱法对浓度效应、pH值以及离子强度与色氨酸的荧光光谱特性之间的关系进行了相关研究。研究结果表明：（1）色氨酸在低浓度范围（0.01-3 mg.L^-1）呈现出良好线性关系,相关系数达到0.995 88,在高浓度范围内（3-30 mg.L^-1）线性关系稍差,相关系数0.912 47;（2）在酸性条件下,其荧光相对强度随着pH值的升高而增强,6.5〈pH〈7.5的范围内荧光相对强度比较稳定,在pH值接近12时,荧光相对强度急剧下降;（3）随着离子强度的增强,其荧光相对强度有所降低,当硝酸根的浓度达到一定量后,出现了红移现象。
Tryptophan is one kind of representative pollutants in waste water.The present paper focuses on the research on the relation between the consistence,pH,ionic strength and the fluorescent characteristic of tryptophan.The result shows that：（1） Tryptophan in the low consistence range（0.01-3 m·L-1） shows good linear relation,the correlation coefficient is up to 0.995 88,while the linear relation in the high consistence range（3-30 mg·L-1） is slightly worse and the correlation coefficient is only 0.942 24;（2） In the acidic condition,the relative fluorescence intensity of tryptophan strengthens while the pH arises,and when the pH is in the range（6.5, 7.5）,the intensity is relatively steady,while when the pH reaches 12,it drops off;（3） With the enhancement of the ionic strength,the relative fluorescence intensity of tryptophan reduces to some extent,and when the nitrate ion reaches to a high consistence,the spectrogram shows EERS.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2010年第12期3277-3280,共4页
Spectroscopy and Spectral Analysis
基金
国家(863计划)项目(2009AA063002)
四川省科技支撑项目(2009SZ0118)资助
关键词
色氨酸
浓度效应
PH
离子强度
Tryptophan
Concentration effect
pH
Ionic strength
