测定酒醅中长链脂肪酸及脂肪酸乙酯含量的方法
By using gas chromatography-triple quadrupole mass spectrometry and isotope internal standard-external standard method, the detection of long-chain fatty acids and fatty acid ethyl esters in baijiu was optimized, solving the accuracy problem in the determination of long-chain fatty acids and fatty acid ethyl esters in baijiu and achieving efficient and accurate quantitative analysis.
CN120891116BActive Publication Date: 2026-07-17LUZHOU PINCHUANG TECH CO LTD +2
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- LUZHOU PINCHUANG TECH CO LTD
- Filing Date
- 2025-09-24
- Publication Date
- 2026-07-17
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Figure CN120891116B_ABST
Abstract
本发明属于化学分析检测技术领域，具体涉及测定酒醅中长链脂肪酸及脂肪酸乙酯含量的方法。为了准确、稳定且精密的测定酒醅中长链脂肪酸及脂肪酸乙酯含量，本发明采用气相色谱‑三重四极杆质谱联用法，通过优化18种长链脂肪酸及脂肪酸乙酯的离子对及对应的碰撞能量，使用EI和MRM模式，将化合物的特异性母离子碰撞诱导解离，去除了其他子离子干扰，只对选定的特异子离子进行质谱信号采集检测。通过检测结果分析，采用本发明检测方法，各物质间有显著的分离效果，检测灵敏高。各物质在23 min内均完成出峰。而且本发明检测方法能检测到ppb级，其响应具有良好的线性关系；RSD为1.94%～15.35%，具备良好的稳定性。
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