Determination of mycotoxins in pu-erh tea, black tea, and green tea samples

Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica
Lu WangWei Jia

Abstract

To establish a robust method for the determination of mycotoxins in tea samples, and to provide means for the quality and safety control of tea products. Samples of 20 tea products acquired from international market were extracted by organic solvents (acetonitrile containing 0.1% formic acid) or hot water, respectively. The extracts were analyzed by UPLC-MS/MS.A good linear regression was achieved in a range of 39.1 to 5 000 ng•L⁻¹ for aflatoxin B1 (AFB1) and aflatoxin G1 (AFG1), 117 to 15 000 ng•L⁻¹ for aflatoxin B2 (AFB2) and aflatoxin G2 (AFG2), 2.44 to 313 ng•L⁻¹ for fumonisin B1 (FB1), fumonisinB2 (FB2) and fumonisin B3 (FB3), and 3 125 to 5 000 ng•L⁻¹ for deoxynivalenol, with recovery rates between 85.7% and 99.6%. The coefficient of the linear equation for all standards was greater than 0.999 0, and the RSD value was less than 10%. Mycotoxins were detected in several tea samples using the two extraction methods but with different outcomes. The levels of mycotoxins detected ranging from 0.15 to 7.31 μg•kg⁻¹ were well below the State or US FDA regulation limits of mycotoxins in food products. Both methods are simple, accurate, and sensitive, and thus, suitable for the quantitative determination of mycotoxins in different f...Continue Reading

Related Concepts

Related Feeds

Basal Ganglia

Basal Ganglia are a group of subcortical nuclei in the brain associated with control of voluntary motor movements, procedural and habit learning, emotion, and cognition. Here is the latest research.

Related Papers

Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
S KumagaiY Sugita-Konishi
Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
A RahmaniF Soleimany
© 2022 Meta ULC. All rights reserved