The absorbance of a 50 % aqueous caprolactam solution is spectrometrically measured at a wavelength of 390 nm and an optical path length of 50 mm. The result is expressed in Hazen units by multiplying the absorbance measured by a constant factor equal to 150. This factor is derived from measurements of absorbance of diluted standard solutions of platinum-cobalt scale.

General information

  • Status :  Under development
  • Edition : 2
  • :
    ISO/TC 61/SC 5
    Physical-chemical properties
  • 71.080.30
    Organic nitrogen compounds

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