Determination of the concentration of higher alcohols with enzyme coupled flow-injection analysis in model systems
The activities of native and immobilized alcohol oxidases (AOD) originating from Pichia pastoris, Hansenula sp., Candida boidinii and Peniophora gigantea were compared with regard to the oxidation of various higher alcohols. Except Candida boidinii, the immobilized enzymes were applied in a flow-inj...
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Published in | Analytica chimica acta Vol. 322; no. 3; pp. 131 - 139 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Amsterdam
Elsevier B.V
10.04.1996
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | The activities of native and immobilized alcohol oxidases (AOD) originating from
Pichia pastoris, Hansenula sp.,
Candida boidinii and
Peniophora gigantea were compared with regard to the oxidation of various higher alcohols. Except
Candida boidinii, the immobilized enzymes were applied in a flow-injection analysis system and investigated as a function of the various operation variables. During the oxidation O
2 is consumed which concentration was measured with an amperometric detector. At the same time H
2O
2 is produced, the concentration of which is used for the oxidation of a redox indicator (ABTS) catalysed by peroxidase and measured with a photometer. The amperometric method is simpler and more economical, but less sensitive. The photometric method consumes the dissolved redox indicator and peroxidase, but is highly sensitive especially for higher alcohols. The concentrations of
n-propanol,
n-butanol and
n-pentanol can be measured with satisfactory sensitivity with immobilized alcohol oxidases originating from
Pichia pastoris and
Peniophera gigantea in a one molar potassium phosphate buffer (pH 7.5). The concentrations of isopropanol, octanol, dodecanol and benzylalcohol can be measured only when larger than 1
g
l
−1. |
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ISSN: | 0003-2670 1873-4324 |
DOI: | 10.1016/0003-2670(95)00610-9 |