Dtierent gels were used as a matrix for physlcal enzyme lmmoblhzatlon on the sensmg surface of glass pH electrodes The recommended techmque of lmmobtllzatlon 1s based on enzyme entrapment wlthm a gel prepared m situ on the glass electrode surface Polyivmyl chloride),, cellulose trnntrate and especia
Urea sensors based on PVC membrane pH electrode
✍ Scribed by Stanisław Gła̧b; Robert Koncki; Ewa Kopczewska; Izabela Wałcerz; Adam Hulanicki
- Book ID
- 116069390
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 435 KB
- Volume
- 41
- Category
- Article
- ISSN
- 0039-9140
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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
A bromhexine ion-selective PVC membrane electrode based on bromhexinium tetraphenylborate has been prepared with dioctyl phthalate as plasticizer. The electrode showed a linear response with a slope factor of 57.5 mV/concentration decade at 20°C over the concentration range from 4 ϫ 10 Ϫ4 to 10 Ϫ1 M