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Table 2 Get acquainted with your data

From: Wrangling environmental exposure data: guidance for getting the best information from your laboratory measurements

1. Verify chemical identities.
Check CAS number, chemical name, isomer type of reported analytes vs. analytical standards purchased by lab (see Additional file 2 for example correspondence).
2. Count (overall and by batch) the number of:
“Real” samples – compare these to the chain of custody that lists the samples submitted for analysis to make sure all submitted samples were analyzed
Lab control and/or matrix spike recoveries
Reference samples (e.g., CRMs)
Surrogate spike recoveries
Blanks (solvent method, field, matrix, other)
Duplicates
3. Examine any data qualifier flags reported by the lab and make sure interpretation is clear.