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BS 4258-10

78th Edition, January 31, 1978

Complete Document

Methods of Test for Phosphoric Acid (Orthophosphoric Acid) for Industrial Use Part 10: Determination of Oxides of Nitrogen Content

Includes all amendments and changes through Reaffirmation Notice , December 15, 1996


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Additional Comments:
SAME AS ISO 3709 * W/D NO S/S
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Product Details:

  • Revision: 78th Edition, January 31, 1978
  • Published Date: December 15, 1996
  • Status: Not Active, See comments below
  • Document Language: English
  • Published By: British Standards Institution (BSI)
  • Page Count: 12
  • ANSI Approved: No
  • DoD Adopted: No

Description / Abstract:

Spectrophotometric measurement of the yellow-coloured nitrophenol, at a wavelength of about 435 nm, formed after permanganate oxidation of nitrous nitrogen to nitric nitrogen and reaction of the latter with 3,4-xylenol. Applicable to products having an oxides of nitrogen content, expressed as nitrogen, equal to or greater than 0.2 mg/kg. Also for use in the food industry.