Analytical chemistry
Study of the separation
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We include updates on Electronvolt, Titration, Acid dissociation constant, Parts-per notation, Crucible, Emission spectrum, Chemical equilibrium, Atomic absorption spectroscopy, Calibration curve, Molar absorption coefficient, Filtration, Inductively coupled plasma mass spectrometry, Thermogravimetric analysis, Empirical formula, Soxhlet extractor, Bland–Altman plot ... and more.
| 2022 |
Mass cytometry
Fluidigm received a capital infusion and rebranded itself as Standard BioTools.
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| 2020 |
Acid value
Dallas Group of America (DGA) and American Oil Chemists' Society (AOCS) collaborated to develop a standard method (5a-40) for testing free fatty acid content in cooking oils. DGA subsequently produced a simplified test kit based on this method.
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| 2019 |
Dalton
Revision of the SI (International System of Units) occurred, which likely impacted the definition and measurement of the dalton unit in scientific measurements.
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| 2019 |
Dalton
The BIPM retained the dalton in its 9th edition of the SI brochure, dropping the unified atomic mass unit from its table of non-SI units, while noting that dalton (Da) and unified atomic mass unit (u) are alternative names for the same unit.
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| 2019 |
Dalton
Redefinition of the mole occurred, which slightly impacted the practical equality between molar mass and average molecular mass in daltons.
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| 2019 |
PCO2
Earth's atmospheric carbon dioxide concentration reached a mean value of 409.8 ppm, marking the highest atmospheric CO2 level in at least 800,000 years, primarily due to anthropogenic fossil fuel burning.
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| 2019 |
Electronvolt
The SI system revised its standards, establishing an exact value for the electronvolt (eV) as a unit of energy measurement.
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| 2018 |
Dalton
CODATA defined values of universal constants, setting the Planck constant, speed of light, and Avogadro constant to precisely defined values.
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| 2018 |
Iodine value
ISO 3961 standard was published, officially recognizing the Wijs method as the international standard for Iodine Value determination.
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| 2018 |
Flowers of sulfur tests
ASTM B765 standard guide for selection of porosity and gross defect tests for electrodeposits and related metallic coatings was updated.
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| 2018 |
Flowers of sulfur tests
ASTM B809 standard test method for porosity in metallic coatings by humid sulfur vapor ('Flowers-of-Sulfur') was revised.
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| 2018 |
Flowers of sulfur tests
ASTM B809-95 standard was updated, referencing the Flowers of Sulfur (FOS) testing method for porosity of metallic coatings susceptible to sulfur-induced corrosion.
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| 2017 |
Flowers of sulfur tests
ASTM B810 standard method for calibration of atmospheric corrosion test chambers was reapproved.
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| 2016 |
Flowers of sulfur tests
ASTM B735 standard test method for porosity in gold coatings on metal substrates by nitric acid vapor was introduced.
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| 2014 |
Dalton
CODATA released values for fundamental physical constants, highlighting the uncertainty in the Planck constant as the main limiting factor in precision of the Avogadro constant.
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| 2014 |
Flowers of sulfur tests
ASTM B798 standard test method for porosity in gold or palladium coatings on metal substrates by gel-bulk electrography was revised.
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| 2014 |
Flowers of sulfur tests
ASTM B799 standard test method for porosity in gold and palladium coatings by sulfurous acid/sulfur-dioxide vapor was updated.
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| 2014 |
Mass cytometry
Fluidigm acquired DVS Sciences, positioning itself as a key company in single cell technology.
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| 2013 |
Flowers of sulfur tests
ANSI/ISA-71.04 environmental conditions standard for process measurement and control systems was published by the International Society of Automation.
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| 2013 |
Flowers of sulfur tests
ASTM B542 standard terminology relating to electrical contacts and their use was published.
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| 2012 |
Position-specific isotope analysis
A team of scientists used NMR spectroscopy to measure position-specific carbon isotope abundances of glucose and other sugars, demonstrating that isotope abundances are heterogeneous within molecules based on different metabolic pathways.
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This contents of the box above is based on material from the Wikipedia articles Position-specific isotope analysis, Electronvolt, Dulong–Petit law, PCO2, Isotopic analysis by nuclear magnetic resonance, Dalton (unit), Flowers of sulfur tests, Acid value, Mass cytometry & Iodine value, which are released under the Creative Commons Attribution-ShareAlike 4.0 International License.