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. Cross References:BS 3978BS 4258:Part 1BS 4258:Part 2BS 4258:Part 3BS 4258:Part 4BS 4258:Part 5BS 4258:Part 6BS 4258:Part 7BS 4258:Part 8BS 4258:Part 9BS 4258:Part 11ISO/R 847
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Methods of test for phosphoric acid (orthophosphoric acid) for industrial use-Determination of oxides of nitrogen content
BSI Group , 01/31/1978
Pages: 8
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