摘要
采用异硫氰酸苯酯(PITC)为柱前衍生化试剂,结合反相高效液相色谱法,建立了同时测定莲雾果实中15种游离氨基酸含量的方法。采用Atlantis T3柱为固定相,以0.1 mol/L乙酸钠缓冲液(pH6.5,含0.5%三乙胺)和乙腈-水(4∶1)为流动相进行梯度洗脱,流速为1.0 mL/min,柱温35℃,紫外检测器波长254 nm。各氨基酸组分在2.0~500 mg/L范围内具有良好的线性关系,相关系数r均大于0.99,检出限为0.08~0.35 mg/L,定量限为0.35~1.25 mg/L,加标回收率为85.61%~106.68%,相对标准偏差RSD均小于5%。该方法使得15种氨基酸很好的分离,且准确度和精密度好,灵敏度和回收率高,适用于莲雾果实游离氨基酸含量的分析。
A high performance liquid chromatography method for simultaneous determination of 15 free amino acids in wax apple fruit by pre-column derivatization with phenyl isothiocyanate(PITC)was established.The separation was achieved using a Atlantis T3 column under the gradient elution with the mobile phases composed of 0.1 mol/L sodium acetate buffer(pH=6.5)and acetonitrile-water(4:1)at the flow rate of 1.0 mL/min,column temperature of 35℃and UV detector wavelength at 254 nm.The calibration curves of amino acid component had good linearity over the range from 2.0 to 500 mg/L with correlation coefficient all above 0.99.The detection limits were in the range of 0.08~0.35 mg/L and the quantitation limit were in the range of 0.35~1.25 mg/L.The spiked recoveries were between 85.61%and 106.68%and the RSDs were less than 5%.This method could separate the 15 amino acids with high accuracy,high sensitivity and recovery.The method was successfully used to analyze the free amino acids in wax apple fruit.
作者
张国华
吴光斌
陈昭华
张珅
陈发河
ZHANG Guo-hua;WU Guang-bin;CHEN Zhao-hua;ZHANG Shen;CHEN Fa-he(College of Food and Biological Engineering,Jimei University,Xiamen 361021,China)
出处
《食品工业科技》
CAS
北大核心
2020年第21期230-234,共5页
Science and Technology of Food Industry
基金
国家自然科学基金(31171777)
福建省自然科学基金(2018J01448)。
关键词
高效液相色谱
莲雾
游离氨基酸
异硫氰酸苯酯
柱前衍生
high performance liquid chromatography
wax apple
free amino acids
phenyl isothiocyanate
precolumn derivatization