CN104237367A - 一种应用于小分子定性定量分析检测和高通量筛选微生物培养液样品试剂盒及其制备 - Google Patents
一种应用于小分子定性定量分析检测和高通量筛选微生物培养液样品试剂盒及其制备 Download PDFInfo
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Abstract
一种应用于小分子定性定量分析检测和高通量筛选微生物培养液样品试剂盒的制备,将微生物培养液样本放置室温,充分解冻;加入-20度同等体积的混合溶液-基本裂解液,在50度水浴中反应5分钟;离心;收集上清液;基本裂解液为QL2,QL2物质组成及体积比为:10-50%甲醇、50-90%乙氰、1-7%甲酸,此试剂盒制备方法简单、成本较低。
Description
技术领域
本技术属于分析化学应用领域,具体涉及表面激光解析质谱领域。
背景技术
表面激光解析质谱是近年来发展起来的一种新型的软电离生物质谱,其中以基质辅助激光解析电离飞行时间质谱(MALDI-TOF-MS)为最重要的实例,此项发明获得过诺贝尔化学奖。主要由两部分组成:基质辅助激光解吸电离离子源(MALDI)和飞行时间质量分析器(TOF)。MALDI的原理是用激光照射样品与基质形成的共结晶薄膜,基质从激光中吸收能量传递给生物分子,在电离过程中将质子转移到生物分子或从生物分子得到质子,而使生物分子电离的过程。因此它是一种软电离技术,适用于混合物及生物大分子的测定。TOF的原理是离子在电场作用下加速飞过飞行管道,根据到达检测器的飞行时间不同而被检测即测定离子的质荷比(M/Z)与离子的飞行时间成正比,检测离子。MALDI-TOF-MS具有灵敏度高、准确度高及分辨率高等特点,为生命科学等领域提供了一种强有力的分析测试手段。
然而,以基质辅助激光解析电离飞行时间质谱为首的所有基于表面激光解析的质谱都需要将样品制备在特制靶板上面,其操作是将样品分散在基质分子中并形成晶体。当用激光照射晶体时,基质从激光中吸收能量,样品解吸附,基质-样品之间发生电荷转移使得样品分子电离,电离的样品在电场作用下飞过真空的飞行管,根据到达检测器的飞行时间不同而被检测,即通过离子的质量电荷之比(M/Z)与离子的飞行时间成正比来分析离子,并测得样品分子的分子量。焦点问题就在于通用的基质分子的分子量在1000-3000da,造成了过量的背景质谱峰。这就决定了所有此类基于表面激光解析的质谱分析只能适用于大分子检测,比如蛋白质,长链多肽,核酸,高分子材料等等,而不能应用于小分子检测(分子量小于1000da),或者说基于表面激光解析的质谱分析的高灵敏度/高通量等独特的优势无法施展在小分子分析检测上面.而分子量小于1000da的小分子却是对人类最重要的最具应用价值的一类化学产品,例如95%以上的药物小分子,所有的氨基酸,维生素等等和人类生活健康相关的化学物质。
目前现有技术针对小分子检测和筛选还停留在光谱法检测,例如荧光发光检测或者衍生出可以荧光检测的底物,但此类检测要求目标小分子分子结构具有光活性集团,另一弊端就是往往光度法灵敏度较低,检测不到微量的小分子浓度。液相质谱(LC-MS)及气相质谱(GC-MS)的已经开始应用在小分子的检测和高通量筛选。但需要消耗大量的人力和溶剂耗材,而且一个样品从制备到质谱分析再到出结果需要相当长一个过程,根据要求不同,分析一个样品从样品制备到拿到结果需要30-60分钟,远远不能满足现代生物医药发展的高通量筛选要求。
发明内容
发明目的:找到一种制备方法简单、成本较低的样品制备方法,节省开支与时间。
技术方案:一种应用于小分子定性定量分析检测和高通量筛选微生物培养液样品试剂盒,由同等体积的样品与基本裂解液组成,基本裂解液为QL2,QL2物质组成及体积比为:10-50%甲醇、50-90%乙氰、1-7%甲酸。
一种应用于小分子定性定量分析检测和高通量筛选微生物培养液样品试剂盒的制备,将微生物培养液样本放置室温,充分解冻;加入-20度同等体积的混合溶液-基本裂解液,在50度水浴中反应5分钟;离心;收集上清液;基本裂解液为QL2,QL2,QL2物质组成及体积比为:10-50%甲醇、50-90%乙氰、1-7%甲酸。
优选方案为QL2物质组成及体积比为:50%甲醇、50%乙氰、1%甲酸。
有益效果:1、制备方法简单;2、成本较低。
附图说明
图1利用本发明检测到的高产脂肪酸酵母菌的裂解后的质谱图.
具体实施方式
微生物培养液样品制备试剂盒基本裂解液QL2及样品制备方法
将微生物培养液样本(单个离心管,96孔多孔板,384孔多孔板)放置室温10分钟,充分解冻。加入-20度同等体积的混合溶液-基本裂解液QL2(QL2物质组成及体积比为:10-50%甲醇、50-90%乙氰、1-7%甲酸),作用5分钟,并在50度水浴中作用5分钟。3000rmp离心10分钟后,收集上清液。
如图1所示为酵母菌发酵后,裂解细菌的产物分析。我们可以从此方法来快速筛选高产菌种。
Claims (3)
1.一种应用于小分子定性定量分析检测和高通量筛选微生物(杆菌,酵母菌,曲霉等)培养液样品试剂盒,其特征在于,由同等体积的样品与基本裂解液组成,基本裂解液为QL2,QL2物质组成及体积比为:10-50%甲醇、50-90%乙氰、1-7%甲酸。
2.一种应用于小分子定性定量分析检测和高通量筛选微生物培养微生物(杆菌,酵母菌,曲霉等)培养液样品试剂盒的制备,其特征在于,将微生物培养液样本放置室温,充分解冻;加入-20度同等体积的混合溶液-基本裂解液,在50度水浴中反应5分钟;离心;收集上清液;基本裂解液为QL2,QL2物质组成及体积比为:10-50%甲醇、50-90%乙氰、1-7%甲酸。
3.根据权利要求1所述的应用于小分子定性定量分析检测和高通量筛选微生物培养液样品试剂盒的制备,其特征在于,QL2物质组成及体积比为:50%甲醇、50%乙氰、1%甲酸。
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102654490A (zh) * | 2011-03-02 | 2012-09-05 | 上海市食品药品检验所 | 液相色谱-串连质谱法测定五加科植物中真菌毒素含量的方法 |
| US20140234873A1 (en) * | 2006-11-24 | 2014-08-21 | Agency For Science, Technology And Research | Apparatus for processing a sample in a liquid droplet and method of using the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140234873A1 (en) * | 2006-11-24 | 2014-08-21 | Agency For Science, Technology And Research | Apparatus for processing a sample in a liquid droplet and method of using the same |
| CN102654490A (zh) * | 2011-03-02 | 2012-09-05 | 上海市食品药品检验所 | 液相色谱-串连质谱法测定五加科植物中真菌毒素含量的方法 |
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