The phosphorus content of fire-resistant textiles is determined by measurement of the emission intensity at 528 nm of the HPO molecular species, produced by aspiration of an aqueous sample extract into a cool hydrogen-nitrogen diffusion flame. In the case of durable flame-retardant agents, a preliminary fusion of the textile with potassium hydroxide is necessary, followed by an ion-exchange treatment of the extract; non-durable flame-retardants are determined directly, after water extraction of the material and ion-exchange separation.
Basch, A. and Wasserman, T., The Determination of Phosphorus in Cellulosic Fabrics, Textile Res. J.40, 676 (1970).
2.
British Standard 4060: 1966, Specification for Compressed Wool Felts, Appendix A.2, British Standards Institute, London, 1966.
3.
Ibid., Appendix A.8.
4.
Coates, H., Insolubilization of Further Polymerizable Methylol-Phosphorus Polymeric Materials , British Patent 938989, October 9, 1963.
5.
Dagnall, R.M. , Thompson, K.C., and West, T.S., Molecular-emission Spectroscopy in Cool Flames; Part II: The Behaviour of Phosphorus-containing Compounds, Analyst93, 72-78 (1968).
6.
Davis, A., Dinan, F.J., Lobbett, E.J., Chazin, J.D., and Tufts, L.E., Phosphorus Determination by Flame Photometry, Anal. Chem.36, 1066-1068 (1964).
7.
Elliott, W.N. , Heathcote, C., and Mostyn, R.A., The Determination of Phosphorus in Lubricating Oils by Cool-flame EmissionSpectroscopy, Talanta, in press.
8.
Elliott, W.N. and Mostyn, R.A., Determination of the Phosphoric Acid Content of the Acid Component of Etch Primer Paint by Flame-emission Spectrophotometry , J. Oil Colour Chem. Assoc.53, 989-993 (1970).
9.
Idem., The Determination of Phosphate in Detergents by Cool-flame Emission Spectroscopy , Analyst96, 452-456 (1971).
10.
Kirk, Raymond E. and Othmer, Donald F., Eds., "Encyclopedia of Chemical Technology ," Vol. 9, 2d ed., New York, Interscience, 1966, pp. 300-325.
11.
Skogerboe, R.K., Gravatt, Ann S., and Morrison , G.H., Flame Spectrophotometric Determination of Phosphorus, Anal. Chem.39, 1602-1605 (1967).
12.
Syty, A. and Dean, J.A., Determination of Phosphorus and Sulfur in Fuel-rich Air-Hydrogen Flames, Appl. Opt.7, 1331-1336 (1968).
