Assessment of the long-term stability of pesticide residues under freezing conditions in brown rice and soybean certified reference materials.

The concentration showed a decreasing trend in none of the target pesticides when the samples were stored at temperatures between −20 °C and −30 °C, which indicated that the target pesticides were stable for the tested long terms. long-term stability pesticide residue brown rice soybean certified reference material pmc-status-qastatus 0 pmc-

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