Gas chromatographic determination of residual hydrazine and morpholine in boiler feed water and steam condensates |
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Authors: | S Vatsala V Bansal D K Tuli M M Rai S K Jain S P Srivastava A K Bhatnagar |
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Institution: | (1) Research & Development Centre, Indian Oil Corporation Limited, Sector-13, 121007 Faridabad, India |
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Abstract: | Summary Hydrazine, an oxygen scavenger in boiler water, was derivatised to the corresponding acetone azine and determined at the ng ml–1 level by gas chromatography. Morpholine, a corrosion inhibitor used in steam boilers, was estimated either directly (if >2.0 g ml–1) or by quantitative preconcentration (0.1 ng – 2.0 g ml–1). To obtain symmetrical peaks for these amines, the column packing was coated with KOH. Use of a nitrogen-specific detector improved accuracy of estimation of hydrazine and morpholine, giving a RSD of 1.9–3.6%. Chromatographic analysis of these amines in boiler feed water and steam condensate samples collected from boilers servicing a petroleum refinery is described. Environmental safety regulations calls for monitoring of hydrazine and the methods developed can easily be adapted for this purpose. |
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Keywords: | Gas chromatography Morpholine Hydrazine Boiler feed water and steam condensates |
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