In this paper we aim to demonstrate,asaproof-of-concept,thefeasibilityofthemassproductionof
effectivepointofcaretestsfornitritequantification inenvironmental,foodandclinicalsamples.Fol-
lowing ourpreviousworkonthedevelopmentofthirdgenerationelectrochemicalbiosensorsbasedon
the ammoniaforming nitrite reductase (ccNiR), hereinwereducedthesizeoftheelectrodes'systemtoa
miniaturized format,solvedtheproblemofoxygeninterferenceandperformedsimplequantification
assaysinrealsamples.Inparticular,carbonpastescreenprintedelectrodes(SPE)werecoatedwitha
ccNiR/carbon inkcompositehomogenizedinorganicsolventsandcuredatlowtemperatures.Thebio-
compatibility ofthesechemicalandthermaltreatmentswasevaluatedbycyclicvoltammetryshowing
that thecatalyticperformancewashigherwiththecombinationacetoneanda40 °C curingtemperature.
The successfulincorporationoftheproteininthecarbonink/solventcomposite,whileremainingcata-
lyticallycompetent,attestsforccNiR's robustnessandsuitabilityforapplicationinscreenprintedbased
biosensors.
Becausethedirectelectrochemicalreductionofmolecularoxygenoccurswhenelectroanalyticalmea-
surementsareperformedatthenegativepotentialsrequiredtoactivateccNiR (ca.0.4 VvsAg/AgCl),an
oxygenscavengingsystembasedonthecouplingofglucoseoxidaseandcatalaseactivitieswassuccessfully
used. Thisenabledthequantificationofnitriteindifferentsamples(milk,water,plasmaandurine)ina
straightforwardwayandwithsmallerror(1–6%).Thesensitivityofthebiosensortowardsnitritereduction
under optimizedconditionswas0.55AM1 cm2 withalinearresponserange0.7–370 μM.
ในกระดาษนี้เรามุ่งหวังที่จะแสดงให้เห็นถึง , asaproof แนวคิด thefeasibilityofthemassproductionof
effectivepointofcaretestsfornitritequantification สิ่งแวดล้อม foodandclinicalsamples fol -
, .
ourpreviousworkonthedevelopmentofthirdgenerationelectrochemicalbiosensorsbasedon lowing ammoniaforming ไนไตรต์รีดักเตส ( ccnir ) hereinwereducedthesizeoftheelectrodes'systemtoa
ขนาดเล็กรูปแบบsolvedtheproblemofoxygeninterferenceandperformedsimplequantification
assaysinrealsamples โดยที่ carbonpastescreenprintedelectrodes ( SPE ) werecoatedwitha
ccnir / คาร์บอน inkcompositehomogenizedinorganicsolventsandcuredatlowtemperatures . thebio ofthesechemicalandthermaltreatmentswasevaluatedbycyclicvoltammetryshowing
-
เข้ากันได้ที่ thecatalyticperformancewashigherwiththecombinationacetoneanda40 ° C curingtemperature .
-
successfulincorporationoftheproteininthecarbonink / solventcomposite whileremainingcata , lyticallycompetent attestsforccnir , ของ robustnessandsuitabilityforapplicationinscreenprintedbased
-
becausethedirectelectrochemicalreductionofmolecularoxygenoccurswhenelectroanalyticalmea ตาม .surementsareperformedatthenegativepotentialsrequiredtoactivateccnir ( ประมาณ 0.4 vvsag 0.46% ) , oxygenscavengingsystembasedonthecouplingofglucoseoxidaseandcatalaseactivitieswassuccessfully
ใช้ . thisenabledthequantificationofnitriteindifferentsamples ( นม , น้ำ , plasmaandurine ) (
straightforwardwayandwithsmallerror ( 1 ) thesensitivityofthebiosensortowardsnitritereduction
6 % )ภายใต้ optimizedconditionswas0.55am 1 ซม. 2 withalinearresponserange0.7 μ– 370 เมตร
การแปล กรุณารอสักครู่..
