Food additives and Packaging Division, National Institute of Food and Drug Safety Evaluation , Cheongju , Republic of Korea.
Hazardous Substances Analysis Division, Daejeon Regional Office of Food and Drug Safety , Daejeon , Republic of Korea.
Food Addit Contam Part B Surveill. 2019 Sep;12(3):167-174. doi: 10.1080/19393210.2019.1579760. Epub 2019 Feb 22.
Benzoic, sorbic and propionic acid are used as preservatives in foods and can also be naturally present in processed foods. The levels of preservatives in 939 vegetables were determined. Benzoic and sorbic acid were analysed by high-performance liquid chromatography with a diode-array detector and further confirmed by liquid chromatography-tandem mass spectrometry, whereas propionic acid was analysed using a gas chromatography-flame ionization detector and further confirmed by gas chromatography-mass spectrometry. Benzoic and propionic acid were found in 10.9% and 36.2%, respectively, of the samples. In contrast, sorbic acid was not found in any of the samples. The highest amounts of benzoic and propionic acid were found in perilla leaves (0.33-298 mg kg) and ginseng (<LOD-32.8 mg kg), respectively. The background concentration ranges of naturally occurring preservatives in vegetables determined in this study could be used for inspection services of standard criteria to address consumer complaints or trade disputes.
苯甲酸、山梨酸和丙酸被用作食品防腐剂，也可能存在于加工食品中。本研究测定了 939 种蔬菜中的防腐剂含量。采用二极管阵列检测器的高效液相色谱法和液相色谱-串联质谱法进一步验证分析了苯甲酸和山梨酸，而丙酸则采用气相色谱-火焰离子化检测器和气相色谱-质谱法进行分析和验证。结果发现，10.9%的样品中含有苯甲酸，36.2%的样品中含有丙酸。而山梨酸则不存在于任何样品中。在罗勒叶（0.33-298mg/kg）和人参（<LOD-32.8mg/kg）中发现了最高量的苯甲酸和丙酸。本研究确定了蔬菜中天然存在的防腐剂的背景浓度范围，可用于标准标准检验服务，以解决消费者投诉或贸易争端。
