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Incidence and levels of ochratoxin A contamination in various commercial cereals and coffee products in Taiwan from 2012 to 2013.
| Sample | No. of samples | No. of positive samples (%) | Mean of positive samples (range, ng/g) | No. of substandard samples (%) |
|---|---|---|---|---|
| Rice | 45 | 0 | <LOQ | 0 |
| Oat | 20 | 2 (10.0) | 2.95 (2.9–3.0) | 0 |
| Wheat and their products | 29 | 0 | <LOQ | 0 |
| Roasted coffee bean | 28 | 0 | <LOQ | 0 |
| Coffee powder | 32 | 3 (9.4) | 1.47 (0.8–2.1) | 0 |
| Total | 154 | 5 (3.2) | 2.06 (0.8–3.0) | 0 |
LOQ = limit of quantification.
