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反相高效液相色谱法检测不同品种和叶位桑叶中1-脱氧野尻霉素

作  者:
魏兆军;蒋磊;周乐春;汪爱民;张松
单  位:
合肥工业大学生物与食品工程学院
关键词:
桑叶;1-脱氧野尻霉素;反相高效液相色谱;衍生化
摘  要:
建立以芴甲氧酰氯(FMOC-Cl)为衍化剂的柱前衍生化-反相高效液相紫外线检测法测定桑叶中1-脱氧野尻霉素(DNJ)含量的方法,并对不同品种、不同叶位桑叶中DNJ含量进行检测。结果表明:以0.05mol/LHCl为溶剂提取桑叶粉中的DNJ,用芴甲氧酰氯(FMOC-Cl)为衍生化试剂,在pH8.50硼酸盐缓冲液条件下,衍生化和RP-HPLC检测效果最好。反相高效液相色谱-紫外检测法检测DNJ时,流动相中乙腈:0.1%醋酸为55:45(V/V)时色谱分离效果最好,DNJ-FMOC的峰面积与DNJ浓度呈高度正相关关系,相关系数为0.9852。不同品种的桑叶中DNJ含量不同,本研究的15个样品中青阳青桑的DNJ含量最高,达到0.1486%,皮桑含量最低,为0.04291%。不同叶位桑叶的DNJ含量不同,第1叶位至第5叶位桑叶的DNJ含量逐渐降低,说明桑叶随着发育成熟,DNJ的含量逐渐降低。结果显示该方法快捷、稳定、灵敏、准确度高,适合桑叶中DNJ含量的检测。
译  名:
RP-HPLC Detection of 1-Deoxynojirimycin in Different Varieties and Sites of Mulberry Leaves
作  者:
WEI Zhao-jun,JIANG Lei,ZHOU Le-chun,WANG Ai-min,ZHANG Song(School of Biotechnology and Food Engineering,Hefei University of Technology,Hefei 230009,China)
关键词:
mulberry leaves;1-deoxynojirimycin(DNJ);RP-HPLC;derivatization
摘  要:
A method of pre-column derivatization with FMOC-Cl followed by RP-HPLC with UV detection was established for the determination of 1-deoxynojirimycin(DNJ) content in different varieties and sites of mulberry leaves.DNJ was extracted from mulberry leaves using 0.05 mol/L HCl and derivatized using FMOC-Cl in borate buffer solution(pH 8.50) prior to RP-HPLC detection.The chromatographic separation was achieved on a Waters X-Terra column using a mobile phase consisting of a mixture of acetonitrile and 0.1% aqueous acetic acid(55:45,V/V).There was a high positive correlation between the peak area and concentration of DNJ-FMOC with a correlation coefficient of 0.9852.The DNJ content was varied in different varieties of mulberry leaves.Among 15 varieties of mulberry,Qingyang Qing mulberry leaves contained the highest DNJ(0.1486%),while Pi mulberry leaves the lowest(0.04291%).Also,mulberry leaves in different sites contained different DNJ contents.It decreased from the top to bottom gradually,indicating DNJ content is reduced with the maturation of mulberry leaves.

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