地理标志产品镇江香醋标准符合性验证分析

Standard compliance verification analysis of geographical indication product Zhenjiang aromatic vinegar

中文关键词:  镇江香醋  标准验证  有机酸

英文关键词:Zhenjiang aromatic vinegar  standard verification  organic acid

中文摘要:

      目的 从理化指标、特征有机酸以及检验方法等对2018年江苏镇江地理标志产品镇江香醋进行标准验证。方法 对5个质量等级, 共计20批次镇江香醋样品进行抽检, 采用GB/T 18623-2011标准对特征性成分进行分析检测, 并对检验标准进行验证。结果 镇江香醋5个等级产品理化特性均符合标准规定, 未检测到致病菌, 菌落总数以及大肠菌群均未超过标准规定的限量要求; 重金属铅和总砷、真菌毒素黄曲霉毒素B1以及食品添加剂苯甲酸和山梨酸均符合标准规定技术限量要求; 具有镇江香醋标志性特征有机酸(乳酸、乙酸、焦谷氨酸和琥珀酸), 且随着等级要求越高, 其有机酸含量越高。结论 镇江香醋特征性成分完全符合其标准规定要求, 镇江香醋标准与国家强制性标准一致, 建议可对有机酸的液相检测方法进行优化, 尝试离子排斥色谱柱或耐酸C18柱, 以满足镇江香醋有机酸液相检测更高的分析要求。

英文摘要:

      Objective To verify the physical and chemical indicators, characteristic organic acids and testing methods of Zhenjiang aromatic vinegar in Zhenjiang, Jiangsu province in 2018. Methods Totally 20 samples of Zhenjiang aromatic vinegar in 5 quality grades were sampled. The characteristic components were analyzed and tested according to GB/T 18623-2011 standard and the test standards were verified. Results The physical and chemical properties of 5 grades of Zhenjiang aromatic vinegar products were in compliance with the standard. No pathogenic bacteria was detected and colonies and coliforms were below the limits set by the standard. Heavy metal lead and total arsenic, mycotoxins aflatoxin B1 and food additives benzoic acid and sorbic acid were all in accordance with the standard. The samples had the characteristics of Zhenjiang aromatic vinegar organic acids (lactic acid, acetic acid, pyroglutamic acid and succinic acid), and the organic acid content became higher as the grade became higher. Conclusion The characteristic components of Zhenjiang aromatic vinegar meet the requirements of the standard. The Zhenjiang aromatic vinegar standard is consistent with the national mandatory standard. And it is suggested that the liquid phase detection method of organic acids can be optimized by using ion exclusion column or acid resistant C18 column in order to satisfy the higher analysis requirements of organic acid liquid phase detection Zhenjiang aromatic vinegar.