Determination of furanic compounds and acidity for Italian honey quality,Flavour and Fragrance Journal

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Determination of furanic compounds and acidity for Italian honey quality
Flavour and Fragrance Journal ( IF 2.1 ) Pub Date : 2018-08-13 , DOI: 10.1002/ffj.3468
Azzurra Apriceno ₁ , Anna Maria Girelli ₁ , Francesca Romana Scuto ₁ , Anna Maria Tarola ₂

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The quality of honey is influenced by botanical origins and acidity. 5‐Hydroxymethyl‐2‐furaldehyde (HMF) is a well‐monitored indicator for freshness and quality, whereas no restriction is reported for 2‐furfural. The aim of the study is the determination of these compounds in 21 Italian honey samples through high‐performance liquid chromatography (HPLC). In order to validate the HPLC method, the detection and quantification limits (LOD and LOQ, respectively), recovery, precision (repeatability), and linearity were determined. The quantity of HMF extracted ranges from 3.35 to 43.21 mg/kg, and 2‐furfural is found only in chestnut and wood samples in the range of 0.3–1.7 mg/kg. In addition, the effect of storage time effect was investigated for HMF, 2‐furfural, and free and lactone acidities over a 4‐month period. Finally, another compound was revealed and, on the basis of attenuated total reflectance Fourier transform infrared (ATR‐FTIR) spectroscopy, HPLC mass spectrometry, UV spectra, and chromatographic results, is hypothesized to be 2‐(furan‐2‐methyl)‐4‐methoxyfuran‐3‐(2H)‐one. The absence of any aldehyde group in the proposed compound is confirmed by the 2,4‐dinitrophenylhydrazine spectroscopic method. Profiles of HMF, 2‐furfural, and the hypothesized furanic compound have been outlined according to the floral origin of the honey.

中文翻译：

测定呋喃类化合物和酸度以测定意大利蜂蜜的品质

蜂蜜的质量受植物来源和酸度的影响。5-羟甲基-2-糠醛（HMF）是监测新鲜度和品质的指标，而2-糠醛没有限制的报道。该研究的目的是通过高效液相色谱法（HPLC）测定21种意大利蜂蜜样品中的这些化合物。为了验证HPLC方法，确定了检测限和定量限（分别为LOD和LOQ），回收率，精密度（重复性）和线性。提取的HMF量为3.35至43.21 mg / kg，仅在栗子和木材样品中发现的2-糠醛含量为0.3-1.7 mg / kg。此外，还研究了贮存时间效应对4个月内HMF，2-糠醛，游离酸和内酯酸的影响。最后，揭示了另一种化合物，并基于衰减的全反射傅立叶变换红外（ATR‐FTIR）光谱，HPLC质谱，UV光谱和色谱结果，假定为2-（呋喃-2-甲基）-4-甲氧基呋喃-3-（2H）-1。通过2,4-二硝基苯肼光谱法确认了所提议化合物中不存在任何醛基。根据蜂蜜的花香来源概述了HMF，2-糠醛和假定的呋喃化合物的概况。4-二硝基苯肼光谱法根据蜂蜜的花香来源概述了HMF，2-糠醛和假定的呋喃化合物的概况。4-二硝基苯肼光谱法根据蜂蜜的花香来源概述了HMF，2-糠醛和假定的呋喃化合物的概况。

更新日期：2018-08-13

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