A rapid method for the quantitative analysis of total acid number in biodiesel based on headspace GC technique

Xie, Wei-Qi; Gong, Yi-Xian; Yu, Kong-Xian

doi:10.1016/j.fuel.2017.08.070

Cited by 12 publications

(5 citation statements)

References 18 publications

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“…65 To settle this circumstance, various instrumental analysis methods are established to determinate the TAN of petroleum samples, such as electrospray ionization mass spectrometry (ESI− MS), 66 mid-Fourier transform infrared spectroscopy (mid-FTIR), 65 Fourier transform mid-infrared spectroscopy with attenuated total reflection, 67,68 and reaction headspace gas chromatography. 69 3.2. Infrared (IR) Spectroscopy.…”

Section: Separation Of Cas From Petroleummentioning

confidence: 99%

“…In addition, the titration method may overestimate the acid number because other compounds, such as thiols and phenols, are also titratable by alkali . To settle this circumstance, various instrumental analysis methods are established to determinate the TAN of petroleum samples, such as electrospray ionization mass spectrometry (ESI–MS), mid-Fourier transform infrared spectroscopy (mid-FTIR), Fourier transform mid-infrared spectroscopy with attenuated total reflection, , and reaction headspace gas chromatography …”

Section: Analysis Of Cas In Petroleummentioning

confidence: 99%

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Carboxylic Acids in Petroleum: Separation, Analysis, and Geochemical Significance

et al. 2021

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Carboxylic acids (CAs), common oxygen-containing compounds in petroleum samples, have been paid high attention in several areas, including petroleum geochemistry, petroleum processing, and petroleum pollution research. This paper focuses on the overview of separation and analysis of CAs in petroleum and its geochemical significance. The first section describes those studies that have aimed to separate and enrich CAs from the extremely complex petroleum samples prior to instrumental analysis. In the second section, the methods for identifying and quantifying CAs are discussed, in which massspectrometry-based methods are highlighted because of their superior performances in qualitative and quantitative analyses of individual CAs. The third section presents the studies on the geochemical expression of CAs in crude oils and hydrocarbon source rocks. This includes the investigations of CAs as molecular markers in research of the origin, migration, and biodegradation of oil.

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Section: Separation Of Cas From Petroleummentioning

confidence: 99%

Section: Analysis Of Cas In Petroleummentioning

confidence: 99%

Carboxylic Acids in Petroleum: Separation, Analysis, and Geochemical Significance

et al. 2021

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“…The headspace sampling technique is a useful tool for analyzing volatile substances in complex matrices. [17][18][19][20] A key advantage of the headspace technique is its precise temperature control during analysis. In our previous study, 21 we described a headspace GC method for measuring moisture content in paper samples by analyzing water vapor at 125 °C.…”

Section: Introductionmentioning

confidence: 99%

Establishing a new methodology for determining the water absorbability of cellulose-derived materials via a vapor-monitoring headspace strategy

Gong,

Xie

2024

Anal. Methods

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“…The headspace gas chromatography-mass spectrometry system has the capability to analyze the off-gassing of compounds from a substrate, provided appropriate calibration standards are available [12]. The headspace sampling technique has been used in a variety of applications, such as measuring acetaldehyde levels to detect alcohol consumption [13], measuring volatile compounds from cow's milk [14], measuring halogenated VOCs from industrial groundwater [15], and many others [16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Qualitative Assessment of Off-Gassing of Compounds from Field-Contaminated Firefighter Jackets with Varied Air Exposure Time Intervals Using Headspace GC-MS

2023

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Firefighters are exposed to a complex mix of volatile and semi-volatile compounds from burning construction materials, consumer products, and other elements during fire suppression and rescue. These compounds can be absorbed onto the gear worn by firefighters and, depending on their volatility, can be released from the gear under different conditions. Few studies have focused on the off-gassing of toxic compounds from firefighters’ gear, particularly in terms of qualitative analysis methods. This study introduces a novel qualitative analysis method using headspace gas chromatography–mass spectrometry (HS-GC-MS) to assess off-gassing from field-contaminated jackets at regular intervals. Our findings show that certain compounds, such as acetic acid and di-ethyl-hexyl-phthalate (DEHP), remained present even after the gear were allowed to air out for 48 h. The persistent off-gassing of chemicals, even under ambient conditions, raises concerns about potential hazards that could pose risks for personnel in the vicinity of contaminated gear, including inside fire stations. The implications of these findings extend beyond fire stations and may have significant public health implications for firefighters who are repeatedly exposed to these compounds over time.

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A rapid method for the quantitative analysis of total acid number in biodiesel based on headspace GC technique

Cited by 12 publications

References 18 publications

Carboxylic Acids in Petroleum: Separation, Analysis, and Geochemical Significance

Carboxylic Acids in Petroleum: Separation, Analysis, and Geochemical Significance

Establishing a new methodology for determining the water absorbability of cellulose-derived materials via a vapor-monitoring headspace strategy

Qualitative Assessment of Off-Gassing of Compounds from Field-Contaminated Firefighter Jackets with Varied Air Exposure Time Intervals Using Headspace GC-MS

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