What is the purpose of running blanks during a measurement run?

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Multiple Choice

What is the purpose of running blanks during a measurement run?

Running blanks in XRF measurements is about separating what comes from the sample from what comes from the instrument and surroundings. A blank is measured under the same conditions as real samples but contains no analyte, so any detected signals are background coming from the instrument itself, the environment, or potential contamination in the measurement chain. That background can be quantified and then subtracted from sample spectra to yield the true net signal of the elements being analyzed. Blank checks also help detect contamination or carryover in the measurement chain, such as residues on the sample holder or components in the detector path, which could bias results. Calibration with known standards serves a different purpose, and determining a sample’s color isn’t relevant to XRF.

Running blanks in XRF measurements is about separating what comes from the sample from what comes from the instrument and surroundings. A blank is measured under the same conditions as real samples but contains no analyte, so any detected signals are background coming from the instrument itself, the environment, or potential contamination in the measurement chain. That background can be quantified and then subtracted from sample spectra to yield the true net signal of the elements being analyzed. Blank checks also help detect contamination or carryover in the measurement chain, such as residues on the sample holder or components in the detector path, which could bias results. Calibration with known standards serves a different purpose, and determining a sample’s color isn’t relevant to XRF.

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