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.
BS 4258-10-1978由英国标准学会 GB-BSI 发布于 1978-01-31,并于 1978-01-31 实施。
BS 4258-10-1978 在中国标准分类中归属于: G11 无机酸、碱,在国际标准分类中归属于: 71.060.30 酸。
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