Enzymatic biosensor for urea based on an ammonium ion-selective bulk optode membrane
โ Scribed by Christine Stamm; Kurt Seiler; Wilhelm Simon
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 825 KB
- Volume
- 282
- Category
- Article
- ISSN
- 0003-2670
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๐ SIMILAR VOLUMES
A new type of enzymatic sensors for the determination of urea based on an ionophore-free pH membrane electrode has been constructed. The membrane material was polyvinyl chloride modified with 1,4-diaminobutane. Chemical urease immobilization enabled the formation of a mono-and bimolecular enzyme la
The pH response of a pH-sensitive fieldeffect transistor (FET) is not affected by a ca. l-pm thick membrane formed from r-aminopropyltriethoxysilane and glutaraldehyde over the gate insulator by a vapor deposition method. The response between pH 5.5 and 8.5 is ca. 61 mV pH-' at 37ยฐC in 5 mM Tris-HCl