Bubble Chart Showing Background Levels of Drugs (IMAGE)

National Institute of Standards and Technology (NIST)

Bubble Chart Showing Background Levels of Drugs

Caption

In this bubble chart, the center of each circle represents the percentage of samples that contained a drug (y-axis), and the bubble size represents the average amount collected. Drugs are listed in alphabetical order across the x-axis. Drugs of similar structure are colored the same. This chart includes data from one of the three labs involved in the study.

Credit

The National Institute of Standards and Technology (NIST)

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