BS 4258-10:1978
$86.31
Methods of test for phosphoric acid (orthophosphoric acid) for industrial use – Determination of oxides of nitrogen content
| Published By | Publication Date | Number of Pages |
| BSI | 1978 | 12 |
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.
