Results 91 to 100 of about 7,435 (217)

The use of certified reference materials for laboratories proficiency testing

Стандартные образцы, 2017
The notion of proficiency testing, interlaboratory comparison, proficiency testing scheme is given. The main types ofproficiency testing schemes that meet international standards is describes.
S. V. Shpakov
doaj  

Clinical Validation of Four Point‐of‐Care High‐Risk HPV Assays, Including Two Reduced‐Valency Assays, for Cervical Cancer Screening in Low‐Resource Settings

International Journal of Cancer, Volume 159, Issue 8, Page 2004-2014, 15 October 2026.
High‐risk human papillomavirus (hrHPV) testing improves cervical cancer screening by facilitating earlier detection and prevention. In low‐resource settings, however, cost and increased referrals limit its use. At the same time, many new and more affordable assays lack validation.
Neerja Bhatla, MaryLuz Rol, Seema Singhal, Showket Hussain, Anushree Patil, Pranay Tanwar, Shalini Singh, Vikrant M. Bhor, Kiran Munne, Richa Vashishtha, Shachi Vashist, Eric Lucas, Richard Muwonge, Arianis Tatiana Ramírez, Anju Singh, Vikas Khan, Jyoti Rani, Nasera Firdausi, Sandeep Sisodiya, Rutuja Wakchaure, María Alejandra Picconi, Alejandro Calderón, Margo Bell, Annemie De Smet, Alex Vorsters, Gary M. Clifford, Madhavi Chandra, Jitendra Kumar, Partha Basu   +28 more
wiley   +1 more source

In-Depth Analysis of the Data from an Interlaboratory Study of Quantitative Non-Target Screening—How Do the Instrumental Methods Compare?

Molecules
Non-target screening utilizing liquid chromatography–high-resolution mass spectrometry is increasingly employed for the environmental monitoring of contaminants; however, obtaining quantitative results of detected suspected compounds is challenging ...
Louise Malm, Nikiforos Alygizakis, Reza Aalizadeh, Anneli Kruve   +3 more
doaj   +1 more source

CO2 and N2O Emissions From Vehicles in Seoul Megacity, South Korea: Insights From Mixing Ratio and Stable Isotope Ratios

Rapid Communications in Mass Spectrometry, Volume 40, Issue 18, 30 September 2026.
ABSTRACT Rationale Vehicular traffic is a major source of anthropogenic greenhouse gases in megacities; however, real‐world constraints on vehicle‐derived N2O emissions and their isotopic characteristics remain limited. Methods Air samples were collected from three tunnels and urban background sites (a university campus and mountain) in Seoul, South ...
Jeongeun Kim, Jinho Ahn, Sambit Ghosh, Sakae Toyoda, Shinji Morimoto, Hyunsuk Choi, Jaehoen Jung, Hungyu Lee   +7 more
wiley   +1 more source

Three New Calcium Formate Reference Materials for δ13C Measurements and a Redetermination of the R(13C/12C) Ratio for VPDB Based on Proton Nuclear Magnetic Resonance Measurements

Rapid Communications in Mass Spectrometry, Volume 40, Issue 18, 30 September 2026.
ABSTRACT Rationale Isotope ratio mass spectrometry (IRMS) and proton nuclear magnetic resonance (1H NMR) spectroscopy are independent techniques for determining the isotope ratio R(13C/12C) in organic compounds. However, the lack of suitable reference materials has limited intercalibration of results from these methods.
David W. Hoffman, Cornelia Rasmussen, Arndt Schimmelmann, Lauren T. Reid, Haiping Qi, Tyler B. Coplen   +5 more
wiley   +1 more source

Interlaboratory Comparison of Extractable Organofluorine Measurements in Groundwater and Eel (<i>Anguilla rostrata</i>): Recommendations for Methods Standardization. [PDF]

Environ Sci Technol, 2023
Ruyle BJ, Pickard HM, Schultes L, Fredriksson F, Heffernan AL, Knappe DRU, Lord HL, Meng P, Mills MA, Ndungu K, Roesch P, Rundberget JT, Tettenhorst DR, Van Buren J, Vogel C, Westerman DC, Yeung LWY, Sunderland EM.   +17 more
europepmc   +1 more source

Quantification of Sulfonated Polyacrylamides by SEC‐UV in Produced Water: Validation and Oilfield Case Study

Journal of Applied Polymer Science, Volume 143, Issue 33, September 5, 2026.
Size exclusion chromatography with UV–vis detection, combined with ultrasonication pretreatment, enables sensitive detection and quantification of back‐produced polymer at very low concentrations in produced water. This approach supports reliable polymer monitoring and offers a practical route to improve surveillance of polymer flooding performance ...
Eduardo José Creatto, Luis Maqueira, Daniel da Silva Vicente, Thierry Leblanc, Nathaniel Terra, Lara Arinelli, Aurora Pérez‐Gramatges   +6 more
wiley   +1 more source

High Proportion of PNH Type II Neutrophils Is Associated With Thrombosis in Patients Displaying a PNH Clone ≥ 1%

American Journal of Hematology, Volume 101, Issue 9, Page 2311-2328, September 2026.
ABSTRACT The clinical significance of PNH Type II white blood cells (WBCs) remains unclear. We assessed the relative percentage (rel%) of Type II neutrophils in 355 patients with a PNH clone ≥ 1% on neutrophils enrolled by 33 flow cytometry laboratories in the 5‐year French nation‐wide multicenter prospective observational study.
Orianne Wagner‐Ballon, Anne‐Catherine Lhoumeau, Anna Raimbault, Camille Debord, Jean‐Philippe Vial, Valérie Soenen, Mélanie Pannetier, Edouard Bonneville, Elsa Bera, Caroline Bret, Nicolas Chapuis, Véronique Latger‐Cannard, Caroline Mayeur‐Rousse, Véronique Harrivel, François Vergez, Marie Loosveld, Juliette Vo Xuan, Stéphanie Mathis, Gérard Socié, Flore Sicre de Fontbrune, Régis Peffault de Latour, Bernard Drenou, Agathe Debliquis, Magali Le Garff‐Tavernier, on behalf of the French PNH working group CytHem‐HPN, Thomas Boyer, Mikaël Roussel, Marie Guillon, Sabrina Bouyer, Isabelle Kittler, Franck Geneviève, Julien Guy, Sophie Brun, Claude Capron, Sébastien Lachot, Francine Garnache‐Ottou, Richard Veyrat‐Masson, Corine Brunet, Caren Brumpt, Ludovic Lhermitte. Finally, Louis Terriou, Nicolas Blin   +41 more
wiley   +1 more source

Interlaboratory Comparison of Three Sediment Bioaccumulation Tests. [PDF]

Environ Toxicol Chem, 2022
Lotufo GR, Biedenbach JM, Farrar JD, Chanov MK, Hester BW, Warbritton CR, Steevens JA, Netchaev JM, Bednar AJ, Moore DW.   +9 more
europepmc   +1 more source

Analytical Metrics for Quality Assessment of Vanadium Electrolytes in Vanadium Flow Batteries: A Case Study

Energy Storage, Volume 8, Issue 6, September 2026.
ABSTRACT This case study investigates practical approaches for evaluating commercially available vanadium electrolytes (VEL) for vanadium flow battery applications. From the perspective of a potential electrolyte customer, a range of wet chemical and instrumental analytical methods was applied to characterize commercial electrolyte samples obtained ...
Nataliya Roznyatovskaya, Matthias Fühl, Martin Joos, Florian Geier, Jens Noack, Thomas Beyer   +5 more
wiley   +1 more source