The N—CH2OH content of durable press fabrics can be determined by reacting the formaldehyde generated during alkaline hydrolysis of the finish with a known amount of cyanide; the excess cyanide can be titrated directly with silver nitrate using a potentiometric method with a cyanide-sensitive electrode. The data indicate that the method is accurate and reproducible.
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References
1.
Petersen, H., in "Handbook of Fiber Science and Technology: Vol. II, Chemical Processing of Fibers and Fabrics," M. Lewin and S. B. Sello, Eds., Marcel Dekker Inc., New York, 1983, pp. 149-150.
2.
Skoog, D.A., and West, D.M., "Analytical Chemistry," HoltReinhart and Winston, New York, 1963, p. 554.
3.
Walker, J.F., "Formaldehyde," 3rd ed., Reinhold Publishing Company, New York, 1964, p. 492.
