From: Jacob Zabicky (zabicky$##$bgumail.bgu.ac.il)
Date: Wed Jun 16 1999 - 05:44:21 EDT
Isocyanates can be determined by indirect titration with dibutylamine [1],
or GC of this reagent [2], or by derivatizing with tryptamine [3]. A list
of occupational standards for isocyanates, that may include relevant
analytical information, appears in a short review [4].
1. ASTM method D-2772-87, Vol. 6.02, p. 374 (1990).
2. CB Fanska et al., J. Chromatgr., 537, 357 (1991).
3. WS Wu et al., Analyst, 115, 801 (1990); 116, 21 (1991); 117, 9 (1992).
4. J. Zabicky, in Supplement C2: The chemistry of triple-bonded functional
groups, S. Patai (ed.), Wiley, 1994, p. 222.
Hope this helps,
Jacob
>I am looking for a cualitative method to determine traces( <0.5%) of
>unreacted isocianate groups in urethane based polymer, when the isocianate
>used is aliphatic I prefer If there is posible, other than
>N-butylamine-malachita green .
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Prof. Jacob Zabicky Tel. 972-7-6461271/6461062/6472754
Institutes for Applied Research Fax. 972-7-6472969
Ben-Gurion University of the Negev Private: POB 12366, Beer-Sheva 84863
POB 653, Beer-Sheva 84105, ISRAEL Tel. 972-7-6496792
http://profiler.bgu.ac.il/site/main.cfm
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