What must be done to increase the accuracy of XRF readings?

To increase the accuracy of XRF (X-ray fluorescence) readings, applying proper calibration adjustments is essential. Calibration ensures that the XRF device provides precise measurements by aligning its readings with known standards. Without appropriate calibration, the instrument may yield readings that are either too high or too low, leading to erroneous conclusions about lead presence and concentration levels.

Proper calibration takes into account the specific elements and compounds being tested, the matrix of the materials, and any potential interferences that may distort the readings. Regularly calibrating the equipment, especially before conducting tests, enhances the reliability of the results and allows for better comparisons across different samples.

Other methods, such as conducting readings over time or utilizing additional testing methods, can provide context or confirm results but do not directly increase the accuracy of the XRF readings in isolation. Limiting testing to high concentration areas might give a skewed understanding of overall lead presence and does not contribute to improving the accuracy of the readings.