On-Line Monitoring & Product Release of APHA Color with a ClearView db Photometer

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Purpose: Measurement of APHA color either on-line or in a laboratory setting using a photometer. Background: APHA is sometimes referred to as the Platinum- Cobalt (Pt/Co) or Hazen scale. Also referred to as a “yellowness index”, the APHA color scale is a common method of com- parison of the intensity of yellow-tinted samples to assess the quality of liquids that are clear to yellowish in color. Originally developed to determine the purity of

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On-Line Monitoring & Product Release of APHA Color with a ClearView db Photometer

On-Line Monitoring & Product Release of APHA Color with a ClearView db Photometer

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