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Challenging the Expiry Dates of Two Mycotoxins Standards: Afla and Ochra A

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Figure

Figure 1. Structure of OTA according to PubChem-NIH [1].
Figure 2. Structures of AF components according to PubChem-NIH [1].
Table 1. Six different concentrations of AFs components used in the calibration curves and diluted from high purity low concentration original standard where the original stock B1 and 300 ppb for B2 and G2 mycotoxins.from one supplier contained different concentrations of individual: 1000 ppb for G1 and
Table 2. Correlation coefficient (r), limit of quantification (LOQ in ppb) and equation of the calibration curve for each of B1, G1, B2, G2, OTA and caffeine extracted from the ca-libration curves
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