Efficiency of chemiluminescenceOzone Oxides of nitrogen Measurement of nitrogen dioxide Ethylenic hydrocarbons Sulphur compounds Peroxyacetyl nitrate Carbonyls ame chemiluminescence Sulphur and phosphorus Halogens Nitrogen compounds Organic compounds Molecular-emission cavity analysis (M'ECA) Future developments F

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A volumetric procedure is described for the assay of melamine. The addition of an aqueous solution of melamine to a 20% solution of oxalic acid in ethanol produces a crystalline precipitate of melamine mono‐oxalate. The filtered and dried oxalate may be dissolved in acid and titrated with standard potassium permanganate solution. The method is accurate to 0·3% of melamine, and small quantities of cyanogen compounds related to melamine have been shown to have slight effect on the assay.

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