SCHEDULE 2METHODS OF ANALYSIS
3c.DETERMINATION OF NITRIC AND AMMONIACAL NITROGEN — DEVARDA METHOD
Control test7.4
Before carrying out the analysis, check that the apparatus is working properly and that the correct application of the method is used, using an aliquot of a freshly prepared solution of sodium nitrate (4.12) containing, according to the variant chosen, 0.050 g to 0.150 g nitrate nitrogen.