摘要
对羟基苯丙酮酸在一定条件下对色氨酸的自体荧光有显著的猝灭作用。在pH为 11 0 1的NH4 Cl NH3 缓冲介质中 ,对羟基苯丙酮酸的含量在 0～ 15 μg·mL-1范围内与荧光强度的猝灭程度呈良好的线性关系 ,方法检测限为 0 37μg·mL-1,平行测定含 10 μg·mL-1的对羟基苯丙酮酸 2 0次 ,方法的相对标准偏差为 1 2 %。本方法有较高的灵敏度和较好的选择性 ,可用于血清中的对羟基苯丙酮酸含量的测定 。
A fluorescence quenching method for the determination of p-hydroxyphenylpyruvic acid with trytophan in the medium pH 11.01 NH3-NH4Cl is studied. The calibration curve is linear for p-hydroxyphenylpyruvic acid from 0 to 15 mug.mL(-1) with lambda (ex)/lambda (em) = 285/356 nm. The detection limit is 0.37 mug.mL(-1). Twenty replicate determinations of solutions containing 10 mug.mL(-1) p-hydroxyphenylpyruvic acid show a relative standard deviation of 1.2%. This method can be applied to the determination of p-hydroxyphenylpyruvic acid in serum with satisfactory results.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2001年第3期359-361,共3页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金资助项目!(批准号 39860 0 77)
