Results 11 to 20 of about 2,154,103 (323)
A comprehensive review on the use of microextraction techniques in the analysis of cosmetic products
Advances in Sample Preparation, 2022 Microextraction techniques have gained special relevance since their appearance in the 90s, and the analysis of cosmetic products has not been immune to this trend.
Lorenza Schettino +3 more
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A Tutorial on AGREEprep an Analytical Greenness Metric for Sample Preparation
Advances in Sample Preparation, 2022 Sample preparation is a key step in the analytical procedure and a critical component for achieving analytical greenness. AGREEprep is the first metric intended for evaluating the environmental impact of sample preparation methods.
Francisco Pena-Pereira +3 more
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Advances in Sample Preparation, 2022 In the present study, a new chip was designed for simultaneous electromembrane extraction (EME) of acidic and basic analytes. The method followed by the HPLC-UV analysis, was used for simultaneous extraction and determination of trace amounts of target ...
Zohre Hashemlou +2 more
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Application of solid-phase microextraction in atomic spectrometry
Advances in Sample Preparation, 2022 With the growing requirements for the monitoring of heavy metals at an ultra-trace level in the environment and the real-time detection of toxic elements and their compounds for environmental pollution accidents, researchers devoted significant efforts ...
Yubin Su +3 more
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Influence of sample preparation on the transformation of low-density to high-density amorphous ice: An explanation based on the Potential Energy Landscape [PDF]
J. Chem. Phys. 147, 044501 (2017), 2017 Experiments and computer simulations of the transformations of amorphous ices display different behavior depending on sample preparation methods, and on the rates of change of temperature and pressure to which samples are subjected. In addition to these factors, simulation results also depend strongly on the chosen water model.
arxiv +1 more source
Advances in Sample Preparation, 2022 Cannabis sativa L. is an intriguing plant that has been exploited since ancient times for recreational, medical, textile and food purposes. The plant's most promising bioactive constituents discovered so far belong to the terpenoid and cannabinoid ...
Francesca Capetti +5 more
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Why is Superconductivity absent in bulk Infinite-layer Nickelates? [PDF]
arXiv, 2022 We answer in affirmative the absence of superconductivity in bulk prepared samples of doped infinite-layer Nickelates through a simple magnetostatic model. In an independent approach we also employ Density Functional Theory (DFT) calculations for the same investigation.
arxiv
All-optical production of a degenerate mixture of 6Li and 40K and creation of heteronuclear molecules [PDF]
Phys. Rev. A 81, 043637 (2010), 2010 We present the essential experimental steps of our all-optical approach to prepare a double-degenerate Fermi-Fermi mixture of 6Li and 40K atoms, which then serves as a starting point for molecule formation. We first describe the optimized trap loading procedures, the internal-state preparation of the sample, and the combined evaporative and sympathetic
arxiv +1 more source
Advances in Sample Preparation, 2023 Pesticides are a class of compounds that are used to protect agricultural products. However, the uncontrolled use of these chemicals increases the risks associated with their overdosing and rises a significant concern about their effect on human health ...
Kübra Kahremanoğlu +2 more
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$sp^{2}$/$sp^{3}$ carbon ratio in graphite oxide with different preparation times [PDF]
J. Phys. Chem. C, 115, 2705 (2011), 2010 Graphite oxide is an amorphous insulator. Although several models have been suggested, its structure remains controversial. To elucidate this issue, 5 samples were prepared by the Brodie process and the Staudenmaier process. The electronic structure of graphite oxide was examined with x-ray absorption near edge structure and the ratio of $sp^{2}$ to ...
arxiv +1 more source