Novel Coffee Certified Reference Material for Ochratoxin A, B, and C

文献类型： 外文期刊

第一作者： Lin, Tao

作者： Lin, Tao;Du, Lijuan;Shao, Jinliang;Hongcheng, Liu;Jiang, Lu;Cai, Wei;Li, Jialan;Wang, Jing;Hu, Zhengxu

作者机构：

关键词： Coffee certified reference material; high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS; MS); ochratoxin A; ochratoxin B; ochratoxin C; >

期刊名称：ANALYTICAL LETTERS （ 影响因子：2.0； 五年影响因子：1.8 ）

ISSN： 0003-2719

年卷期： 2023 年

页码：

收录情况： SCI

摘要： A coffee-certified reference material (CRM) for ochratoxin A, B, and C (OTA, OTB, and OTC) was created to improve the precision and reliability of these toxins. A collection of 100 bottles (each containing 10 g) of the CRM candidate for OTA, OTB, and OTC was produced by applying a mixed standard solution of OTA, OTB, and OTC to moderately roasted beans that subsequently ground and homogenized. Moreover, considering the intricate matrix interference in coffee, a rapid and sensitive method for OTA, OTB, and OTC in coffee was developed with minimal matrix effects. This approach employed liquid chromatography-tandem mass spectrometry and mixed purification materials (C18 and hydroxylated multi-walled carbon nanotubes (MWCNTs), OH-MWCNTs) for the analysis. Based on the standards GB/T 15000.3-2008/ISO Guide 35: 2017, the CRM demonstrated robust uniformity and stability when stored for 14 d at 4, 20, and 40 & DEG;C, and 12 months at -20 & DEG;C. Eight laboratories were employed to characterize the CRM. The certified values for OTA, OTB, and OTC in coffee were established to be 15.2 & PLUSMN; 0.4, 12.8 & PLUSMN; 0.4, and 3.4 & PLUSMN; 0.1 & mu;g/kg (with a coverage factor k = 2, representing an approximate 95% confidence interval).

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