| 摘要 |
The invention relates to a data carrier having memory locations to which data is written, wherein the memory locations have a number of first memory locations with erroneous data and at least one second memory location for the arrangement of analytical substances on the data carrier, wherein, when the analytical substances react with a medium that is to be investigated, the reaction product may cause a change to the data item which is written to the at least one second memory location, and the number of first memory locations is designed such that, on the one hand, when there is no reaction between the analytical substances and a medium which is to be investigated, a first data record can be determined when reading the data carrier and using a conventional error correction method, and, on the other hand, when the reaction product has caused a change to the data item which is written to the at least one second memory location, a second data record can be determined when reading the data carrier and using the conventional error correction method, with the second data record not being the same as the first data record.
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