A compact, inexpensive sampler instrument for portable capillary electrophoresis was developed for monitoring illegal drugs in human body fluids and evaluated for γ-hydroxybutyric acid (GHB) in simulated saliva samples. The sampler uses peristaltic pumps and pinch and check valves to activate liquid flows. This short communication addresses aspects of CE associated with portability, open access instrumentation, and prospects of CE for citizen science. The extensive use of items provided by the electronic and computer industry contributes to this trend.
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http://dx.doi.org/10.1016/j.chroma.2022.463619 | DOI Listing |
Asian J Transfus Sci
August 2024
Department of Transfusion Medicine, Postgraduate Institute of Medical Education and Research, Chandigarh, India.
Introduction: Hemoglobin (Hb) estimation in blood donors is conducted using capillary samples on portable hemoglobinometers, representing measurement methods in practice. The reference standard is conducted using a venous sample on a hematology analyzer, representing the mentor measurement method or the true value. The correction involves the calculation of the secondary adjustment factor (SAF) to mitigate the difference between the two values.
View Article and Find Full Text PDFAnal Chim Acta
February 2025
Department of Hygiene, Third Faculty of Medicine, Charles University, Ruská 87, 100 00, Prague 10, Czech Republic. Electronic address:
The review focuses on the design of detection cells, the use of microcontrollers for processing and evaluation of the detection signal, and the development of multi-detection systems for electromigration, liquid chromatography, flow-through and microfluidic techniques. A separate section is the introduction of modern 3D printing techniques and the use of new printing materials for the design of multidetection systems. In addition to traditional utilisation in separation techniques, new versions of contactless conductivity detectors are finding applications in FIA, SIA, portable and paper based analytical systems or as independent sensors.
View Article and Find Full Text PDFAm J Trop Med Hyg
December 2024
Laboratorio de Bioinformática, Biología Molecular y Desarrollos Tecnológicos, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias e ingeniería, Universidad Peruana Cayetano Heredia.
As many as one in three people worldwide have anemia, with young children at increased risk of both disease and complications. In settings without clinical laboratories, portable hemoglobinometers serve important roles in diagnosing anemia and estimating prevalence. Here, we assess the validity of two such point-of-care devices-the HemoCue Hb201 and the HemoCue Hb301-relative to the international reference standard, the cyanmethemoglobin method.
View Article and Find Full Text PDFDiagnosis (Berl)
December 2024
Service of Laboratory Medicine, University Hospital of Verona, Verona, Italy.
Objectives: The measurement of fasting glucose is a common practice for lowering the risk of hyperglycemia before an oral glucose tolerance test (OGTT). In this study we analyze advantages and limitations of near-patient measurement of capillary fasting glucose with a portable glucometer or blood sampling and measurement of plasma glucose with laboratory instrumentation.
Methods: The final study population consisted of 241 subjects (mean age: 36 ± 8 years; 97.
Talanta
December 2024
Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin, 300071, China. Electronic address:
Coronavirus disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has caused secondary pandemic, which still poses a serious threat to physical health and economic development. Herein, the target-driven functionalized DNA hydrogel capillary sensor based on cascade signal amplification and carbon coated cobalt manganese modified by prussian blue and platinum nanoparticles (MnCo@C-Pt-PB NPs) has been successfully developed for dual-mode detection of SARS-CoV-2. The cascade signal amplification triggered by target RNA causes the permeability of the DNA hydrogel loaded in the capillary to be destroyed, thereby releasing the embedded MnCo@C-Pt-PB NPs as signal molecules into 3,3',5,5'-tetramethylbenzidine/hydrogen peroxide (TMB/HO) solution under the driving of capillarity.
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