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What is the primary calibration of a spectrophotometer?

April 26, 2017calibration primary spectrophotometer

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What is the primary calibration of a spectrophotometer?

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The primary reference standard for spectrophotometry is the perfect reflecting diffuse (PRD). A PRD is a theoretical material that is perfectly diffuse (Lambertion) and reflects perfectly (100% of all incident light). Properly calibrated spectrophotometers report values relative to the PRD.