Final answer:
Three impurity measures commonly used in chemistry are purity percentage, retention time, and accuracy and precision.
Step-by-step explanation:
Three impurity measures commonly used in chemistry are:
- Purity Percentage: This measure indicates the percentage of impurities present in a substance. For example, a substance that is 99.9% pure means that there is one impurity for every 1000 host atoms or molecules in the crystal.
- Retention Time: In chromatography, retention time refers to the time it takes for a compound to move through the chromatographic column. Different compounds have different retention times, which allows for their identification and separation.
- Accuracy and Precision: These measures assess how close a set of measurements are to the true value (accuracy) and how close multiple measurements of the same quantity are to each other (precision).
Each of these measures provides valuable information about the impurities present in a substance and helps in understanding their effects on the structure and properties of solids.