2.2. Samples

XY Xianli Yang
ZZ Zhiyong Zhao
JW Jianhua Wang
JY Junhua Yang
HE Hengchao E
BC Bo Chen
PH Pengzhen He
YT Yanglan Tan
CZ Changyan Zhou
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A total of 340 samples of wheat-based products were randomly collected in Shanghai markets, including supermarkets, chain stores, and farm product markets, in all 16 city districts. Information concerning the geographic origin of the samples was recorded. All of the samples were ground into fine powder and stored at −20 °C under dry and dark conditions before analysis.

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