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Issue 1228, 1978
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Continuous colorimetric monitoring of vapour-phase urea and cyanates

L. E. Trimble  and  R. J. H. Voorhoeve 

Abstract

A method is described for continuously monitoring the concentrations of urea and cyanates in gases, based on a modification of a colorimetric method used for urea in human serum. The method was calibrated with standard solutions of urea and potassium cyanate. The reproducibility was ±2% throughout. Using this method, the vapour pressure of urea was measured from 58 to 113 °C. The vapour pressure results have an estimated accuracy of 10% in the range 3 × 10–4 to 5 × 10–2 mmHg.

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Article type: Paper
DOI: 10.1039/AN9780300759
Citation: Analyst, 1978,103, 759-765
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    Continuous colorimetric monitoring of vapour-phase urea and cyanates

    L. E. Trimble and R. J. H. Voorhoeve, Analyst, 1978, 103, 759
    DOI: 10.1039/AN9780300759

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