It should be determined from the low and high concentration QC samples and standards that have been processed in the previous run. <br>These samples should be stored under conditions consistent with the automatic sampling conditions (such as 2-8°C and protected from light) and injected in subsequent runs. <br>The actual stability time should be reported in "hours", and the storage time of post-processed samples is calculated from the storage start time to the storage end time.
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