• paper-based headspace extraction combined with digital

    Paper-based headspace extraction combined with digital

    2018-10-01· The method combined paper-based headspace extraction with digital image analysis. The method had the advantages of three different techniques: headspace extraction (sample clean-up and preconcentration), PADs (low reagent consumption), and image analysis (simplicity and cost reduction). No sample treatment (e.g., distillation) was required

  • paper-based headspace extraction combined with digital

    Paper-based headspace extraction combined with digital

    2018-10-01· PAD has been combined with headspace extraction and digital image analysis. • The high sensitivity was due to concentration of analyte on a paper. • Real water sample analysis by the method showed good reproducibility and accuracy. • The method integrated both analyte concentration and determination on a paper.

  • paper-based headspace extraction combined with digital

    Paper-based headspace extraction combined with digital

    Moreover, the paper-based headspace extraction was combined with the distance-based paper device to improve the sensitivity. The enrichment factor was found to be 30-fold and the linearity was

  • distance-based paper device combined with headspace

    Distance-Based Paper Device Combined with Headspace

    Quantification is achieved by measuring color length, thus eliminating the need to differentiate hues and intensities by the user, and the processing data of each imaging device. Moreover, the paper-based headspace extraction was combined with the distance-based paper device to improve the sensitivity.

  • (pdf) distance-based paper device combined with

    (PDF) Distance-Based Paper Device Combined with

    Moreover, the paper-based headspace extraction was combined with the distance-based paper device to improve the sensitivity. The enrichment factor was found to be 30-fold and the linearity was

  • paper-based headspace extraction combined with digital

    Paper-based headspace extraction combined with digital

    A simple, cost-effective, instrumental free and user-friendly analytical method based on the combination of paper-based headspace extraction and digital scanning image analysis was developed for the sensitive detection of cyanide in water and wastewater samples.

  • simultaneous reaction rate spectrophotometric

    Simultaneous reaction rate spectrophotometric

    Paper-based headspace extraction combined with digital image analysis for trace determination of cyanide in water samples. Sensors and Actuators B: Chemical 2018, 270, 28-34. DOI: 10.1016/j.snb.2018.05.021. Randy Jackson, Brian A. Logue.

  • hydride generation for headspace solid-phase extraction

    Hydride Generation for Headspace Solid-Phase Extraction

    Paper-based headspace extraction combined with digital image analysis for trace determination of cyanide in water samples. Sensors and Actuators B: Chemical 2018, 270, 28-34. DOI: 10.1016/j.snb.2018.05.021. Yang Zhao, Lu Tan, Xiaoshan Gao, Guifen Jie, Tingyu Huang.

  • an introduction to headspace sampling in gas

    An Introduction To Headspace Sampling In Gas

    An Introduction to Headspace Sampling in Gas Chromatography Phase Ratio Other factors that can affect the concentration of an analyte in the headspace phase are the respective volumes of the sample and the headspace in the sealed vial. The concentration of analyte in the sample and the headspace can be expressed respectively as Equations 2 and 3.

  • combining gold nanoparticle-based headspace single-drop

    Combining gold nanoparticle-based headspace single-drop

    2019-10-26· A novel method combining headspace single-drop microextraction with a paper-based colorimetric assay was developed. Headspace single-drop microextraction using a microdrop containing unmodified gold nanoparticles (AuNPs) as both the extractant and the colorimetric probe was used for the sensitive and selective determination of Se(IV).

  • hydride generation for headspace solid-phase extraction

    Hydride Generation for Headspace Solid-Phase Extraction

    Paper-based headspace extraction combined with digital image analysis for trace determination of cyanide in water samples. Sensors and Actuators B: Chemical 2018, 270, 28-34. DOI: 10.1016/j.snb.2018.05.021. Yang Zhao, Lu Tan, Xiaoshan Gao, Guifen Jie, Tingyu Huang.

  • combining gold nanoparticle-based headspace single

    Combining gold nanoparticle-based headspace single

    2019-10-26· Combining gold nanoparticle-based headspace single-drop microextraction and a paper-based colorimetric assay for selenium determination. Bagheri N(1), Saraji M(2). Author information: (1)Department of Chemistry, Isfahan University of Technology, Isfahan, 84156-83111, Iran.

  • distance based paper device combined with headspace

    Distance Based Paper Device Combined with Headspace

    Distance Based Paper Device Combined with Headspace Extraction for Determination of Cyanide is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 Thailand License.

  • publications prof. mohammad saraji

    Publications Prof. Mohammad Saraji

    94- M Saraji, N Bagheri “Paper-based headspace extraction combined with digital image analysis for trace determination of cyanide in water samples” Sensors and Actuators B: Chemical (2018) accepted.

  • mathematical equations combined with the mhe-gc

    Mathematical equations combined with the MHE-GC

    In this study, a technique based on multiple headspace extraction gas chromatography (MHE-GC) was applied to determine the transfer kinetics of contaminants from paper-based packaging materials to air because of its sensitivity and safety. Mathematical equations were derived in

  • combining gold nanoparticle-based headspace single-drop

    Combining gold nanoparticle-based headspace single-drop

    A novel method combining headspace single-drop microextraction with a paper-based colorimetric assay was developed. Headspace single-drop microextraction using a microdrop containing unmodified gold nanoparticles (AuNPs) as both the extractant and the colorimetric probe was used for the sensitive and selective determination of Se(IV).

  • gradual optimization of headspace solid-phase

    Gradual Optimization of Headspace Solid-Phase

    ResearchArticle Gradual Optimization of Headspace Solid-Phase Microextraction Conditions of Volatiles in Pepper Chicken Soup Combined with Gas Chromatography-Mass

  • headspace sampler, gc headspace agilent

    headspace sampler, gc headspace Agilent

    The 7697A Headspace Sampler allows introduction of volatile compounds to the GC or GC/MS from virtually any sample matrix while leaving unwanted components in a disposable sample vial. This results in less maintenance and longer lifetimes for the GC consumables in your lab.

  • evaluation of headspace solid-phase microextraction gas

    Evaluation of Headspace Solid-Phase Microextraction Gas

    This work aimed to develop a method to extract VOCs using headspace (HS) and solid-phase microextraction (SPME), which can be applied in future studies to contribute to the understanding of the role of VOCs in the pollination process. Therefore, a HS–SPME method combined with gas chromatography–mass spectrometry (GC–MS) was developed for the extraction and characterization

  • analysis of chemical compounds of agarwood oil based

    Analysis of chemical compounds of agarwood oil based

    An analysis of chemical compounds of agarwood oil involves of three different temperature conditions such as 40°C, 60°C and 80°C has been carried out in this study. The analytical work involves HS-SPME combined with GC-MS analysis to extract and identify the chemical compounds composition in agarwood oil. The zscore technique was introduced

  • intelligent automation for gc/ms and lc/ms gerstel us

    Intelligent Automation for GC/MS and LC/MS GERSTEL US

    GERSTEL MPS robotic pro with Headspace Option. The GERSTEL MPS robotic pro offers the most advanced, easy to use and flexible means of automating headspace analysis available. GERSTEL MAESTRO software allows features such as automated calibration curve preparation, sampling directly from vial and the choice of sample agitation or stirring by

  • quantitative determination of terpenes in cannabis using

    Quantitative Determination of Terpenes in Cannabis Using

    for static headspace GC analysis. In this work, headspace SPME (HS-SPME) was combined with GC/ MS for the quantitative analysis of several selected terpenes in cannabis. The conventional approach for terpene analysis in cannabis involves a solvent extraction followed by GC/FID analysis. HS-SPME offers several advantages over the solvent extraction

  • combining gold nanoparticle-based headspace single-drop

    Combining gold nanoparticle-based headspace single-drop

    A novel method combining headspace single-drop microextraction with a paper-based colorimetric assay was developed. Headspace single-drop microextraction using a microdrop containing unmodified gold nanoparticles (AuNPs) as both the extractant and the colorimetric probe was used for the sensitive and selective determination of Se(IV).

  • static headspace-gas chromatography: theory

    Static Headspace-Gas Chromatography: Theory

    The only reference to provide both current and thorough coverage of this important analytical technique Static headspace-gas chromatography (HS-GC) is an indispensable technique for analyzing volatile organic compounds, enabling the analyst to assay a variety of sample matrices while avoiding the costly and time-consuming preparation involved with traditional GC. Static Headspace-Gas

  • evaluation of headspace solid-phase microextraction gas

    Evaluation of Headspace Solid-Phase Microextraction Gas

    This work aimed to develop a method to extract VOCs using headspace (HS) and solid-phase microextraction (SPME), which can be applied in future studies to contribute to the understanding of the role of VOCs in the pollination process. Therefore, a HS–SPME method combined with gas chromatography–mass spectrometry (GC–MS) was developed for the extraction and characterization

  • quantification of btex in soil by headspace spme–gc–ms

    Quantification of BTEX in Soil by Headspace SPME–GC–MS

    1 1 Quantification of BTEX in soil by headspace SPME-GC-MS using combined standard 2 addition and internal standard calibration 3 4 Dina Orazbayeva1, Bulat Kenessov1*, Jacek A. Koziel2, Dayana Nassyrova1, Nadezhda V. 5 Lyabukhova1 6 7 1 Al-Farabi Kazakh National University, Faculty of Chemistry and Chemical Technology, Center 8 of Physical Chemical Methods of Research and

  • precise and easy static headspace analysis of residual

    Precise and Easy Static Headspace Analysis of Residual

    Application Note 10396: Static Headspace Analysis of Residual Solvents in Flexible Packaging and Quantitation with Multiple Headspace Extraction Following EN 13628-1: 2002 demonstrates the combined analytical power of the Thermo Scientific TRACE 1310 GC and the Thermo Scientific TriPlus 300 Headspace Autosampler to detect and quantify solvents

  • ecite hydrodistillation-headspace solvent

    eCite Hydrodistillation-headspace solvent

    A new method involving concurrent headspace solvent microextraction combined with continuous hydrodistillation (HD-HSME) for the extraction and pre-concentration of the essential oil of Lavandula angustifolia Mill. into a microdrop is developed. A microdrop of n-hexadecane containing n-heptadecane (as internal standard) extruded from the needle tip of a gas chromatographic syringe was inserted

  • face recognition based on pca and lda combination

    Face Recognition Based on PCA and LDA Combination

    2009-12-28· Abstract: A whole face recognition system was proposed in the paper based on PCA and LDA combination feature extraction. Normalization was used to eliminate the redundant information interference. Principal Component Analysis (PCA) was used for feature extraction

  • facilities and services university of calgary

    Facilities and Services University of Calgary

    The digital sonifier has 3 parts: converter, disruptor, and probe. This apparatus is ideal for cell disruption, nanoparticles, chip assay, emulsification, homogenization, cell lysing, processing DNA and proteins, acceleration of reactions, leaching and extraction, and fine mixing degassing.

  • theory and practice of solid phase microextraction

    Theory and practice of solid phase microextraction

    The fibre is contained in a syringe-like SPME device to facilitate convenient handling. This method can be applied to liquid, gaseous or headspace samples. All three sample can be analyzed on the same instrument without modifications to the GC and the extraction and the sample injection process can be fully automated using conventional

  • journal reference for sbse gerstel us

    Journal Reference for SBSE GERSTEL US

    Headspace Sorptive Extraction (HSSE), Stir Bar Sorptive Extraction (SBSE), and Solid Phase Microextraction (SPME) Applied to the Analysis of Roasted Arabica Coffee and Coffee Brew Carlo Bicchi, Cristina Iori, Patrizia Rubiolo, Pat Sandra J. Agric. Food Chem. 2002, 50, 499-459

  • static headspace-gas chromatography: theory

    Static Headspace-Gas Chromatography: Theory

    The only reference to provide both current and thorough coverage of this important analytical technique Static headspace-gas chromatography (HS-GC) is an indispensable technique for analyzing volatile organic compounds, enabling the analyst to assay a variety of sample matrices while avoiding the costly and time-consuming preparation involved with traditional GC.

  • sampling chemistry libretexts

    Sampling Chemistry LibreTexts

    2019-06-15· In headspace or direct immersion sampling, the fiber is exposed to the sample only after the vial septum has been punctured. Following extraction, the fiber is retracted before insertion into the GC, and once inside the injection liner, the fiber is extended for desorption. The fiber apparatus is shown in Figure 8. Figure 8. SPME Fiber Assembly.

  • note 2: detection of arson accelerants using dynamic

    Note 2: Detection of Arson Accelerants Using Dynamic

    The detection of arson accelerants is most commonly accomplished by using a headspace sampling technique combined with Gas Chromatography (GC) and/or Gas Chromatography/Mass Spectrometry (GC/MS). There are three basic types of headspace sampling used for sample preparation: static, passive and dynamic headspace sampling. For most organic

  • analysis of odorants in marking fluid of siberian tiger

    Analysis of Odorants in Marking Fluid of Siberian Tiger

    Common procedures used to chemically characterize scent markings include: solvent-based extraction, headspace extraction, and solid-phase microextraction (SPME) for sample preparation and subsequent sample analyses using gas chromatography (GC), gas chromatography-mass spectrometry (GC-MS),

  • new theory and technology of static headspace analysis

    New Theory And Technology Of Static Headspace Analysis

    As a vapor-phase extraction technique, static headspace gas chromatography (HS-GC) isan indirect detection technology with high accuracy, sensitivity and automaticity. HSextraction is not only successful in eliminating the effects of solvent and non-volatilecomponents in sample matrix on GC analysis or the possible damage to instrument

  • precise and easy static headspace analysis of residual

    Precise and Easy Static Headspace Analysis of Residual

    Application Note 10396: Static Headspace Analysis of Residual Solvents in Flexible Packaging and Quantitation with Multiple Headspace Extraction Following EN 13628-1: 2002 demonstrates the combined analytical power of the Thermo Scientific TRACE 1310 GC and the Thermo Scientific TriPlus 300 Headspace Autosampler to detect and quantify solvents

  • digital.csic: solid-phase microextraction method for the

    DIGITAL.CSIC: Solid-phase microextraction method for the

    The method was applied to the determination of the volatile compounds associated to oxidation of Atlantic horse mackerel (Trachurus trachurus) minced muscle and excellent correlations were obtained with chemical indexes for monitoring lipid oxidation as peroxide value and thiobarbituric acid reactive substances. This combined technique is fast

  • gc-ms applications in pharmaceutical analysis

    GC-MS applications in pharmaceutical analysis

    2017-04-19· The last decade has seen a renascence of GC principally in its hyphenated format, ie, GC-MS where it is now commonly used for the determination of very low levels of volatile mutagenic impurities (MIs) 2 such as alkyl halides, 3 and in the determination of volatile leachables. This article examines the use of GC and GC-MS in these key areas.

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