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73 Newest Publications about the topic calibration standards

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Improving the Quantification of Secondary Organic Aerosol Using a Microflow Reactor Coupled to HPLC-MS and NMR to Manufacture Ad Hoc Calibration Standards

29-Oct-2014 | Emanuela Finessi; Richard T. Lidster; Fiona Whiting; Thomas Elliott; M. Rami Alfarra; Gordon B. McFiggans; Jacquelin ..., Analytical Chemistry, 2014

Secondary organic aerosol (SOA) is a key uncertainty in quantifying the impact of humans on Earth’s climate. SOA is a complex mixture of oxidized organic species, and a fundamental hurdle in determining its composition is the lack of authentic standards for comparison and quantification. Organic ...

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SEC Analysis of Poly(Acrylic Acid) and Poly(Methacrylic Acid)

27-Oct-2014 | Igor Lacík, Marek Stach, Peter Kasák, Vladislav Semak, Lucia Uhelská, Anna Chovancová, Günter Reinhold, Peter Kilz, ..., Macromolecular Chemistry and Physics, 2014

The accurate characterization of molar‐mass distributions of poly(acrylic acid) (PAA) and poly(methacrylic acid) (PMAA) by size‐exclusion chromatography (SEC) is addressed. Two methods are employed: direct aqueous‐phase SEC on P(M)AA and THF‐based SEC after esterification of P(M)AA to the ...

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Quantitative Analysis of Gold Nanoparticles in Single Cells by Laser Ablation Inductively Coupled Plasma-Mass Spectrometry

01-Oct-2014 | Meng Wang; Ling-Na Zheng; Bing Wang; Han-Qing Chen; Yu-Liang Zhao; Zhi-Fang Chai; Helen J. Reid; Barry L. Sharp; Wei ..., Analytical Chemistry, 2014

Single cell analysis has become an important field of research in recent years reflecting the heterogeneity of cellular responses in biological systems. Here, we demonstrate a new method, based on laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS), which can quantify in situ ...

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Quantification of docetaxel and its metabolites in human plasma by liquid chromatography/tandem mass spectrometry

19-Jul-2013 | J. J. M. A. Hendrikx, A. C. Dubbelman, H. Rosing, A. H. Schinkel, J. H. M. Schellens, J. H. Beijnen, Rapid Communications in Mass Spectrometry, 2013

RATIONALE During drug development accurate quantification of metabolites in biological samples using mass spectrometry is often hampered by the lack of metabolites of chemically pure quality. However, quantification of metabolites can be useful for assessment and interpretation of ...

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Certified Reference Materials for Quantification of Vanadate Species in Anodic Alumina Rf-GDOES Depth Profiles

05-Jun-2013 | David Ifezue, Journal of Analytical Atomic Spectrometry, 2013

Certified standards for quantification of rf-GDOES depth profiles of anodic oxide films is very limited. This paper demonstrates that calibration standards for quantification of electrolyte-derived species can be more reliably obtained for inwardly mobile species (phosphorus) than for outwardly ...

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Development of a new in‐vial standard gas system for calibration of solid phase microextraction in high throughput and on‐site applications

02-May-2013 | German A. Gómez‐Ríos, Nathaly Reyes‐Garcés, Janusz Pawliszyn, Journal of Separation Science, 2013

Abstract In this work, an innovative, reproducible and reusable standard generator vial is presented. The standard generator vial consists of vacuum pump oil doped with McReynolds probes (benzene, 2‐pentanone, pyridine, nitropropane, 1‐pentanol, and n‐octane) mixed with a ...

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Stability Assessment of Gas Mixtures Containing Monoterpenes in Varying Cylinder Materials and Treatments

24-Apr-2013 | George C. Rhoderick; Janice Lin, Analytical Chemistry, 2013

Studies of climate change increasingly recognize the diverse influences exerted by monoterpenes in the atmosphere, including roles in particulates, ozone formation, and oxidizing potential. Measurements of key monoterpenes suggest atmospheric mole fractions ranging from low pmol/mol ...

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Chemical composition of soil evolving from municipal solid waste using energy dispersive X‐ray fluorescence

17-Apr-2013 | Dhrubajyoti Gupta, Subinit Roy, Rita Ghosh, Ajoy Kumar Mitra, X-Ray Spectrometry, 2013

Municipal solid waste (MSW) generated in the city of Kolkata, India has been dumped at a site known as ‘Dhapa’, situated in the eastern fringes of the city, since the middle of 19th century. The soil in this area is expected to be evolving from several layers of dumped MSW through many decades. ...

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Sensitive GC-MS/MS Method to Measure Deuterium Labeled Deoxyadenosine in DNA from Limited Mouse Cell Populations

10-Apr-2013 | Don E. Farthing; Nataliya P. Buxbaum; Catherine V. Bare; Shirin M. Treadwell; Veena Kapoor; Kirsten M. Williams; Ron ..., Analytical Chemistry, 2013

A rapid and sensitive gas chromatography-tandem mass spectrometry (GC-MS/MS) method was developed to quantitatively measure low levels of DNA base deoxyadenosine (dA) and its isotopologues (e.g., dA M+1) from limited mouse cell populations. Mice undergoing allogeneic hematopoietic transplantation ...

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An Applicable Strategy for Improvement Recovery in Simultaneous Analysis of 20 Pesticides Residue in Tea

27-Mar-2013 | Shahram Shoeibi, Maryam Amirahmadi, Hossein Rastegar, Roya Khosrokhavar, Amin Mousavi Khanghah, Journal of Food Science, 2013

Abstract It is important to have a reliable method to analyze pesticides in tea, a beverage commonly consumed in Iran. A validated method was developed for the determination of 20 pesticides in tea based on QuEChERS sample preparation and capillary gas chromatography‐quadrupole mass ...

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