Methods of test for phosphoric acid (orthophosphoric acid) for industrial use. Determination of oxides of nitrogen content
Summary:
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.
Pages:
8
BS 4258-10:1978 International Equivalent:
ISO 3709
BS 4258-10:1978 Key Phrases:
Phosphoric acid, Determination of content, Industrial, Quantitative analysis, Spectrophotometry, Nitrogen oxides, Calibration, Laboratory glassware, Distillation methods of analysis, Distillation equipment, Colorimetry, Xylenol, Chemical analysis and testing, Test equipment
BS 4258-10:1978 Cross References:
BS 3978, BS 4258:Part 1, BS 4258:Part 2, BS 4258:Part 3, BS 4258:Part 4, BS 4258:Part 5, BS 4258:Part 6, BS 4258:Part 7, BS 4258:Part 8, BS 4258:Part 9, BS 4258:Part 11, ISO/R 847
