Facile quantification of free and total sulphur dioxide in beer using a flavylium-based fluorescent probe

IF 4.3 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Pub Date : 2025-04-18 DOI:10.1016/j.saa.2025.126199

Weijie Wu, Hongbo He, Jiaqi Lv, Yiqiang Yang, Yanfang Li, Wencai Huang

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Abstract

Accurate and convenient determination of free and total sulphur dioxide (SO₂) in beer is pivotal to guarantee the quality of beer, but the traditional assay methods are laborious, time-consuming, and dependent on experienced technician. In this study, we designed and synthesized a flavylium-based fluorescent probe Hy-S which exhibited selective response to SO₂ under both acidic conditions (pH = 4.0) and basic conditions (pH = 9.0) with low detection limits of 0.076 mg/L and 0.041 mg/L, respectively. The real beer samples were directly assayed to obtain the free SO₂ by the probe-based method while the samples were basified and diluted before spectral measurements to determine the total SO₂. Due to the advantages of fast response, convenience, accuracy and greenness, the probe-based method possesses great potential for quantification of both free and total SO₂ in beer.

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用黄基荧光探针测定啤酒中游离二氧化硫和总二氧化硫的简便定量

准确、便捷地测定啤酒中游离和总二氧化硫（SO2）是保证啤酒质量的关键，但传统的测定方法费力、耗时且依赖经验丰富的技术人员。本研究设计合成了一种黄酮基荧光探针Hy-S，该探针在酸性条件（pH = 4.0）和碱性条件（pH = 9.0）下对SO2均有选择性响应，检出限分别为0.076 mg/L和0.041 mg/L。用探针法直接测定啤酒样品中游离SO2，碱化稀释后用光谱法测定总SO2。探针法具有响应快、方便、准确、绿色等优点，在啤酒中游离SO2和总SO2的定量分析中具有很大的潜力。

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来源期刊

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 物理-光谱学

CiteScore

8.40

自引率

11.40%

发文量

1364

审稿时长

40 days

期刊介绍： Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy (SAA) is an interdisciplinary journal which spans from basic to applied aspects of optical spectroscopy in chemistry, medicine, biology, and materials science. The journal publishes original scientific papers that feature high-quality spectroscopic data and analysis. From the broad range of optical spectroscopies, the emphasis is on electronic, vibrational or rotational spectra of molecules, rather than on spectroscopy based on magnetic moments. Criteria for publication in SAA are novelty, uniqueness, and outstanding quality. Routine applications of spectroscopic techniques and computational methods are not appropriate. Topics of particular interest of Spectrochimica Acta Part A include, but are not limited to: Spectroscopy and dynamics of bioanalytical, biomedical, environmental, and atmospheric sciences, Novel experimental techniques or instrumentation for molecular spectroscopy, Novel theoretical and computational methods, Novel applications in photochemistry and photobiology, Novel interpretational approaches as well as advances in data analysis based on electronic or vibrational spectroscopy.