CN108445105A - 一种乙基香兰素β-D-葡萄糖苷的测定方法 - Google Patents
一种乙基香兰素β-D-葡萄糖苷的测定方法 Download PDFInfo
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Abstract
本发明公开了一种乙基香兰素β‑D‑葡萄糖苷的测定方法,包括①样品提取和②采用UPLC‑MS/MS法进行测定步骤。本发明的测定方法能够有效提取卷烟纸和烟丝中的乙基香兰素β‑D‑葡萄糖苷,并且首次实现乙基香兰素β‑D‑葡萄糖苷含量的测定。该方法快速、准确,灵敏度高,重现性好。
Description
技术领域
本发明属于分析化学领域,具体涉及一种乙基香兰素β-D-葡萄糖苷的测定方法。
背景技术
乙基香兰素葡萄糖苷是一种重要的潜香物质。1997年,缪明明等设计了以α-D-葡萄糖和乙基香兰素为原料合成乙基香兰素-β-D-葡萄糖苷的方法,并将其在卷烟纸上进行测试,结果表明其能使测流烟气具有明显的乙基香兰素的气味。2002年刑其毅同样用MICHAEL法制得乙基香兰素-2,3,4,6-四-O-乙酰-葡萄糖苷和乙基香兰素-β-D-吡喃葡萄糖苷,并对它们进行热解实验,结果表明二者的热解温度分别为305.33℃和234.82℃,前者比后者对热更稳定,二者在其热解温度区间内能分解出大量乙基香兰素,从而为此类香料在卷烟中的应用提供了理论依据。
乙基香兰素葡萄糖苷在卷烟纸、香精香料、饮料和食品行业中有着广泛的应用。乙基香兰素葡萄糖苷在中性溶剂和碱性溶剂中容易变化,目前,尚无方便、快捷的检测方法。准确测定卷烟纸乙基香兰素葡萄糖苷的含量,对卷烟纸的质量控制、应用研究具有指导意义。
发明内容
本发明提供一种乙基香兰素β-D-葡萄糖苷含量的测定方法。该方法首次利用超高压液相色谱-质谱联用仪,通过优化质谱条件和流动相,实现乙基香兰素β-D-葡萄糖苷的提取和快速检出。
本发明的目的是通过以下技术方案来实现的。
一种乙基香兰素β-D-葡萄糖苷的测定方法,其特征在于,包括如下步骤:
①样品提取:将剪碎的卷烟纸样品用甲醇溶液超声提取,离心分离得上层清液;超声提取三次,合并上层清液,以色谱甲醇定溶,以0.22μm的尼龙滤膜过滤后得到测试样品;
②测定:采用UPLC-MS/MS进行测定,仪器条件如下:
液相色谱条件为,色谱柱:C18柱(1.7μm,2.1mm×100mm);流速:0.2~0.3mL/min;柱温:25~35℃;进样量:1~5μL;流动相A为甲醇,流动相B为水;
梯度洗脱条件为:0~4min,60wt%甲醇溶液;4~5min,100wt%甲醇;5min,60wt%甲醇溶液;
质谱条件如下:离子源:电喷雾离子源ESI;扫描方式:负离子扫描;检测方式:多反应监测扫描模式;喷雾电压:3200V;离子源温度:110℃;雾化气:550L/hr;气帘气:50L/hr;碰撞池电压:0.0035mbar;扫描时间:50ms。
优选地,步骤②的质谱分析仪器为电喷雾质谱ESIMS。
优选地,乙基香兰素β-D-葡萄糖苷的保留时间和质谱参数如下表所示:
本发明的有益效果:本发明的测定方法能够有效提取卷烟纸中的乙基香兰素β-D-葡萄糖苷,首次利用超高压液相色谱-质谱联用仪,通过优化质谱条件和流动相,实现卷烟纸中的乙基香兰素β-D-葡萄糖苷的提取和快速检出,方法快速、准确,灵敏度高,重现性好。
附图说明
图1为乙基香兰素β-D-葡萄糖苷的结构式;
图2为本发明乙基香兰素β-D-葡萄糖苷标准品超高液相质谱图(1、定量离子;2.定性离子);
图3为本发明实施例1乙基香兰素β-D-葡萄糖苷测定的超高液相质谱图;
具体实施方式
本发明以下将结合实施例作进一步描述,但并不限制本发明:
实施例1
①样品提取:将剪碎的卷烟纸样品2.0g置于具塞锥形瓶,以甲醇溶液超声提取三次(15mLx3),以4000转/分离心分离,合并提取液至50mL容量瓶,以色谱甲醇定溶,以0.22μm的尼龙滤膜过滤,制得试样。
②测定:采用UPLC-MS/MS法进行测定,仪器条件如下:
液相色谱条件为,色谱柱:C18柱(1.7μm,2.1mm×100mm);流速:0.2~0.3mL/min;柱温:35℃;进样量:3μL;流动相A为甲醇,流动相B为水;
梯度洗脱条件为:0~4min,50wt%甲醇溶液;4~5min,100wt%甲醇;5min,50wt%甲醇溶液;
质谱条件如下:离子源:电喷雾离子源ESI;扫描方式:正离子扫描;检测方式:多反应监测扫描模式;喷雾电压:3200V;离子源温度:110℃;雾化气:550L/hr;气帘气:50L/hr;碰撞池电压:0.0035mbar;扫描时间:50ms;质谱分析仪器为电喷雾质谱ESIMS;
乙基香兰素β-D葡萄糖苷的保留时间和质谱参数如下表所示;
测定结果如图3所示;卷烟纸中乙基香兰素β-D葡萄糖苷的含量是5.34mg/g。
实施例2
①样品提取:烟丝粉末0.5g用15mL甲醇溶液在700KW下超声提取30min,以4000转/分离心分离得上层清液;超声提取三次,合并上层清液至50mL的容量瓶中,以色谱甲醇定溶,以0.22μm的尼龙滤膜过滤后得到测试样品;
②测定:采用UPLC-MS/MS法进行测定,仪器条件如下:
液相色谱条件为,色谱柱:C18柱(1.7μm,2.1mm×100mm);流速:0.2~0.3mL/min;柱温:35℃;进样量:3μL;流动相A为甲醇,流动相B为水;
梯度洗脱条件为:0~4min,50wt%甲醇溶液;4~5min,100wt%甲醇;5min,50wt%甲醇溶液;
质谱条件如下:离子源:电喷雾离子源ESI;扫描方式:负离子扫描;检测方式:多反应监测扫描模式;喷雾电压:3200V;离子源温度:110℃;雾化气:550L/hr;气帘气:50L/hr;碰撞池电压:0.0035mbar;扫描时间:50ms;质谱分析仪器为电喷雾质谱ESIMS;
乙基香兰素β-D葡萄糖苷的保留时间和质谱参数如下表所示;
测定结果显示烟丝中乙基香兰素β-D葡萄糖苷的含量是1.25mg/g。
Claims (3)
1.一种乙基香兰素β-D-葡萄糖苷的测定方法,其特征在于,包括如下步骤:
①样品提取:将剪碎的卷烟纸样品用甲醇溶液超声提取,离心分离得上层清液;超声提取三次,合并上层清液,以色谱甲醇定溶,以0.22μm的尼龙滤膜过滤后得到测试样品;
②测定:采用UPLC-MS/MS进行测定,仪器条件如下:
液相色谱条件为,色谱柱:C18柱(1.7μm,2.1mm×100mm);流速:0.2~0.3mL/min;柱温:25~35℃;进样量:1~5μL;流动相A为甲醇,流动相B为水;
梯度洗脱条件为:0~4min,60wt%甲醇溶液;4~5min,100wt%甲醇;5min,60wt%甲醇溶液;
质谱条件如下:离子源:电喷雾离子源ESI;扫描方式:负离子扫描;检测方式:多反应监测扫描模式;喷雾电压:3200V;离子源温度:110℃;雾化气:550L/hr;气帘气:50L/hr;碰撞池电压:0.0035mbar;扫描时间:50ms。
2.根据权利要求1所述的测定方法,其特征在于,步骤②的质谱分析仪器为电喷雾质谱ESIMS。
3.根据权利要求1所述的测定方法,其特征在于,乙基香兰素β-D-葡萄糖苷的保留时间和质谱参数如下表所示:
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