The optimization-based quantitative determination of multianalyte concentrations from biased biosensor responses is investigated under internal and external diffusion-limited conditions. A computational model of a biocatalytic amperometric biosensor utilizing a mono-enzyme-catalyzed (nonspecific) competitive conversion of two substrates was used to generate pseudo-experimental responses to mixtures of compounds. The influence of possible perturbations of the biosensor signal, due to a white noise- and temperature-induced trend, on the precision of the concentration determination has been investigated for different configurations of the biosensor operation. The optimization method was found to be suitable and accurate enough for the quantitative determination of the concentrations of the compounds from a given biosensor transient response. The computational experiments showed a complex dependence of the precision of the concentration estimation on the relative thickness of the outer diffusion layer, as well as on whether the biosensor operates under diffusion- or kinetics-limited conditions. When the biosensor response is affected by the induced exponential trend, the duration of the biosensor action can be optimized for increasing the accuracy of the quantitative analysis.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4003961 | PMC |
| http://dx.doi.org/10.3390/s140304634 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Rapid and Non-Targeted Qualitative and Quantitative Detection of miRNA in Complex Biological Samples Using Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry with a 3-Aminoquinoline and 2',4',6'-Trihydroxyacetophenone Ionic Liquid Matrix.
J Am Soc Mass Spectrom
January 2025
Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang 310027, China.
A novel ionic liquid MALDI matrix, 3-aminoquinoline/2',4',6'-trihydroxyacetophenone monohydrate (3-AQ/THAP), was developed for the rapid qualitative and quantitative detection of miRNA from biological samples. Compared to the traditional matrix 2,5-dihydroxybenzoic acid (DHB) and previously reported oligonucleotide-specific matrices, such as 3-aminopicolinic acid (3-APA), 3-hydroxypicolinic acid (3-HPA), and 6-aza-2-thiothymine (ATT), the 3-AQ/THAP matrix offers several advantages. It produces fewer alkali metal adduct peaks, exhibits higher sensitivity, and ensures better spot-to-spot repeatability.
View Article and Find Full Text PDFOxygen Activation Biocatalytic Precipitation Strategy Based on a Bimetallic Single-Atom Catalyst for Photoelectrochemical Biosensing.
Anal Chem
January 2025
Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life Science, MOE; College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China.
Article Synopsis
- The traditional biocatalytic precipitation (BCP) method has limitations due to HO's tendency to self-decompose, affecting its effectiveness in quantitative analysis.
- Researchers discovered that a bimetallic single-atom catalyst (Co/Zn-N-C SAC) can activate dissolved oxygen to create reactive oxygen species, leading to improved detection methods.
- The development of a new oxygen-activated photoelectrochemical (PEC) biosensor for chloramphenicol (CAP) detection demonstrates enhanced stability and accuracy by using Co/Zn-N-C SAC and cesium platinum bromide nanocrystals (CsPtBr NCs) without needing external reactants.
Development of a Single-Molecule Biosensor Based on Polymerization-Transcription-Mediated Target Regeneration for Simultaneously One-Pot Detection of Multiple piRNAs.
Anal Chem
January 2025
School of Chemistry and Chemical Engineering, State Key Laboratory of Digital Medical Engineering, Southeast University, Nanjing 211189, China.
PIWI-interacting RNAs (piRNAs) are a class of small noncoding RNAs associated with PIWI proteins within the male germline, and they play significant roles in maintaining genome stability via the modulation of gene expression. The piRNAs are implicated in the progression of various cancers, but the simultaneous monitoring of multiple piRNAs remains a challenge. Herein, we construct a single-molecule biosensor based on polymerization-transcription-mediated target regeneration for the simultaneous one-pot detection of multiple piRNAs.
View Article and Find Full Text PDFPhoto-crosslinking of doped magic-sized nanoclusters for the construction of enhanced electrochemiluminescence biosensors.
Chem Sci
January 2025
State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210093 China
Semiconductor magic-sized nanoclusters (MSCs) possess atomic-level compositional precision and ultrasmall dimensions, allowing accurate modulation of electrochemiluminescence (ECL) properties, essential for advanced bioanalytical applications. However, low intrinsic ECL intensity and poor stability in bipolar electrode (BPE)-ECL systems hinder their broader use. In this work, we addressed these limitations through doping and direct optical crosslinking strategies, achieving a 24-fold boost in the ECL signal and a fivefold stability increase for doped (CdS):Ag MSCs compared with original (CdS) MSCs.
View Article and Find Full Text PDFNanoporous Graphene Integrated onto Bimodal Waveguide Biosensors for Detection of C-Reactive Protein.
ACS Appl Nano Mater
January 2025
Atomic Manipulation and Spectroscopy Group (AMS), Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Bellaterra, 08193 Barcelona, Spain.
Despite the outstanding progress in photonic sensor devices, a major limitation for its application as label-free biosensors for biomedical analysis lies in the surface biofunctionalization step, that is, the reliable immobilization of the biorecognition element onto the sensor surface. Here, we report the integration of bottom-up synthesized nanoporous graphene onto bimodal waveguide interferometric biosensors as an atomically precise biofunctionalization scaffold. This combination leverages the high sensitivity of bimodal waveguide interferometers and the large functional surface area of nanoporous graphene to create highly sensitive, selective, and robust biosensors for the direct immunoassay detection of C-reactive protein (CRP), an inflammatory biomarker widely used in the clinical diagnosis of infections and sepsis.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!