摘要
研究了锌－水杨基荧光酮（ＳＡＦ）－溴化十六烷基三甲胺（ＣＴＭＡＢ）体系的荧光特性．实验结果表明，在ｐＨ９．７５～１０．３５的Ｈ３ＰＯ４－ＨＡｃ－Ｈ３ＢＯ３缓冲介质中，产生荧光熄灭程度最大的激发波长为λｅｘ＝５２４ｎｍ，荧光波长为λｅｍ＝５４９ｎｍ．当锌含量０～２．４μｇ／２５ｍｌ范围内，荧光熄灭程度与浓度呈线性关系，藉以测定微量锌．方法简便，快速，稳定性高，可应用于食品及环境水样中微量锌的测定．
Zn(Ⅱ) in food was determined by fluorometric quenching method with Salicylfluorone (SAF) and Cetyltrimethylammonium bromide (CTMAB) as reagents.In pH=10.0 buffer solution,Zn(Ⅱ),SAF and CTMAB react to form a complex.Its composition was established by methods of continuous variations and molar ratio as Zn(Ⅱ)∶SAF=1∶2.Its maximum excitation wavelength is 524 nm,the maximum emission wavelength is 549 nm.The linear range is 0-2.4 μg/25 ml.The detection limit of Zn(Ⅱ) is 2.7×10 -5 μg/ml.Zinc content in food and environmental water sample were determined with satisfactory results.
出处
《内蒙古大学学报（自然科学版）》
CAS
CSCD
1997年第3期383-386,共4页
Journal of Inner Mongolia University：Natural Science Edition
基金
国家自然科学基金
