Extraction of formic and acetic acids from aqueous solution by dynamic headspace-needle trap extraction

Lou, Dawei; Lee, Xinqing; Pawliszyn, Janusz

doi:10.1016/j.chroma.2008.02.066

Cited by 70 publications

(34 citation statements)

References 29 publications

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“…Alternative sample preparation techniques have been developed as a needle-type sample preparation device. [7][8][9][10][11][12][13][14][15] Compared to the conventional SPME, the needle-type sampling device has been regarded to have good mechanical strength and high extraction capacity. In our previous work, a polymer particulate medium based on a copolymer of methacrylic acid (MA) and ethylene glycol dimethacrylate (EDMA) was synthesized, and packed into a specially-designed needle as the extraction medium.…”

Section: Introductionmentioning

confidence: 99%

Determination of Volatile Organic Compounds for a Systematic Evaluation of Third-Hand Smoking

et al. 2010

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Section: Introductionmentioning

confidence: 99%

Determination of Volatile Organic Compounds for a Systematic Evaluation of Third-Hand Smoking

et al. 2010

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“…The temperature used for extraction is one of the most important parameters for the evaluation of efficiency in SPME and other extraction methodologies. [31] The eff ect of temperature was studied by the analysis of saturated solutions of marine salt, using three diff erent temperatures (40°C, 50°C and 60°C). Two sample quantities were also tested (16 and 25 g).…”

Section: Quantifi Cation Approach For Assessment Of β-Iononementioning

confidence: 99%

Quantification and potential aroma contribution of β‐ionone in marine salt

Silva

Rocha

Coimbra

2010

Flavour & Fragrance J

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A methodology for quantifi cation of β-ionone in marine salt was developed using the headspace solid phase microextraction and gas chromatography-quadrupole mass spectrometry (HS-SPME/GC-qMS). Quantifi cation of β-ionone was achieved by linear regression from an analytical plot of pure standard using the target ion at m/z 177 by ion extraction chromatography (IEC). HS-SPME/GC-qMS combined with IEC mode allowed quantifi cation of trace levels (ng/l) of β-ionone in marine salt aqueous solutions. The methodology developed presented a good linearity (R 2 = 0.981) for the range of concentrations used (16 a 568 ng/l) and a good reproducibility (15%), with limits of detection and quantifi cation of 9 and 29 ng/l, respectively. This methodology was applied to marine salt from diff erent geographical origins (Portugal, France, and Cape Verde). Estimated concentrations of β-ionone in marine salt varied from 241 to 888 ng/kg of salt. The highest values were found for Aveiro, in Portugal, and Guérande, in France, in environments surrounded by a large number of plant and algae diversity. However, in Castro Marim and Tavira (in Algarve, South of Portugal), this compound was not found. According to the odour threshold of β-ionone in water (30 ng/l), aqueous solutions with more than 100 g/l of marine salt can exhibit a violet odour. Similar conditions can occur in the ponds with higher levels of salinity of the traditional saltpans. This methodology proved to be a useful tool for screening and quantifi cation of β-ionone, a compound shown to present potential contribution to marine salt aroma.

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“…In addition, during the extraction/desorption cycles, step-by-step recalibration is needed and typically, only a total of one hundred analyses is recommended for a single fibre. Solid-phase dynamic extraction 10,11 , microextraction in a packed syringe 1,12 , and stir bar sorptive extraction 3,4,16 address these limitations.…”

Section: Introductionmentioning

confidence: 99%

Technical Note - Analysis of Beer Aroma Compounds by Solid-phase Microcolumn Extraction

Hrivňák

Šmogrovičová

Lakatošová

et al. 2010

Journal of the Institute of Brewing

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Due to their low dead volumes, microcolumns with Tenax TA coupled to a capillary column in the modified GC inlet allow analysis of a broad range of compounds (from acetaldehyde to 2-phenylethanol) in a single sample run. In this study, a microcolumn was filled with 10 mg of Tenax TA. Chromatograms showed well-resolved peaks even at the beginning of the run. Static headspace was used to pre-concentrate the compounds. The method is rapid, simple and inexpensive.

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Extraction of formic and acetic acids from aqueous solution by dynamic headspace-needle trap extraction

Cited by 70 publications

References 29 publications

Determination of Volatile Organic Compounds for a Systematic Evaluation of Third-Hand Smoking

Determination of Volatile Organic Compounds for a Systematic Evaluation of Third-Hand Smoking

Quantification and potential aroma contribution of β‐ionone in marine salt

Technical Note - Analysis of Beer Aroma Compounds by Solid-phase Microcolumn Extraction

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