An overview of approaches in liquid chromatography flame ionization detection

Becker, Christian; Jochmann, Maik A.; Schmidt, Torsten

doi:10.1016/j.trac.2018.10.038

Cited by 9 publications

(4 citation statements)

References 46 publications

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“…Serious overdose of pesticide residues can cause acute intoxication, while mild pesticide residues chronically accumulated in human body can also cause many chronic diseases. At present, the widely used methods for pesticide residue detection are liquid chromatography [43], gas chromatography mass spectroscopy [44] and fluorescence analysis [45]. The accuracy of these methods is very high, but the pretreatment processes are very tedious, which is difficult to meet the rapid and on-spot detection in fruit and vegetables.…”

Section: Resultsmentioning

confidence: 99%

Preparation of a Novel SERS Platform Based on Mantis Wing with High-Density and Multi-Level “Hot Spots”

et al. 2019

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The recent development of SERS substrates based on irregular nanostructures for directly molecule recognition has aroused increasing attention. By combining the irregular flake-like nanostructures of mantis wings, high SERS performance of Ag nanofilms, and the chemical stability of Au nanoparticles (NPs), an ultra-sensitive and flexible SERS substrate based on Au NPs functionalized Ag nanofilms-mantis wings (Au-Ag-M.w.) hybrid system is successfully fabricated. When 4-aminothiophenol is selected as the probe molecule, the limit of detection (LOD) is as low as 10−13 M and the relative standard deviation (RSD) is lower than 7.15%. This novel SERS platform exhibits high SERS performance in terms of sensitivity, reproducibility and practicability mainly because there are high-density and multi-level “hot spots” in the appropriate nanogaps. Meanwhile, it also systematically compares the differences of the SERS performance of Cu and Ag decorated M.w. hybrids and how these differences can alter their response. Moreover, the proposed substrate is employed to rapidly detect the pesticide residues on apple peels and the LOD for cypermethrin is estimated at 10−10 mg/mL. Therefore, this novel SERS substrate has great potential in rapid sampling of pesticide residues on real samples and expands the investigation to other natural materials for fabricating various SERS platforms.

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Section: Resultsmentioning

confidence: 99%

Preparation of a Novel SERS Platform Based on Mantis Wing with High-Density and Multi-Level “Hot Spots”

et al. 2019

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“…Traditionally, the mass spectrometer, 31 the gas chromatography, 32 flame ionization detector 33 and Fourier transform infrared spectrometer 34 instruments have been utilized for the detection and the analysis of toxic gases. These analytical devices are usually bulky, expensive and often require trained operators.…”

Section: Gas Sensors: General Overviewmentioning

confidence: 99%

Resistive gas sensors based on metal-oxide nanowires

Mirzaei

Lee

Majhi

et al. 2019

Journal of Applied Physics

176

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Gas sensors are essential for industry and for a wide range of applications. They are for examples applied in public safety, pollution monitoring, and various industrial processes. Among the different gas sensing technologies, semiconducting metal oxide-based gas sensors are the most popular because of their low price, high sensitivity, short response time, high stability and simple operation. In these gas sensors, because gas adsorption has a direct relationship with the surface area of the sensing material, a higher surface area will result in a higher sensing response. Therefore, along with simple synthesis methods, nanowires (NWs) have recently gained special attention for the realization of gas sensors. In this tutorial review, the synthesis of metal oxide NWs, the fabrication of gas sensors and their sensing mechanisms are discussed. Different gas sensors such as single NW, noble metal functionalized NWs, heterojunctions NWs, self-heating NWs, UV-activated NWs and core-shell NWs are presented. This tutorial review aims to provide a broad vision for the researchers and students working in this upcoming field. 2 I. Toxic gases and vaporsGases are intimately linked to life, as most of the living species continuously need to breathe air, which is basically a mixture of oxygen, nitrogen, argon, and other gases. In addition, many gases are used in our industrial era. For example, liquefied petroleum gas (LPG) is widely used in industry, as well as for cooking and heating purposes. 1 Even though LPG is not toxic, it is highly explosive. 2 Also, hydrogen gas is seen as the next "green fuel" and is currently used in fuel cells, although it is highly explosive. 3,4 In addition to explosive gases, the sources of toxic and pollutant gases have been significantly increased in the recent years, and there are many toxic gases in our atmosphere. 5 Toxic gases can cause harm in low levels over long periods of time (chronic exposure) or in higher concentrations over short periods of time (acute exposure). The threshold limit value (TLV) has been defined as the maximum concentration of a gas, which is allowed for repeated exposure without resulting in adverse health effects. 6 For example, the TLV values for CO, NO2 and H2S gases are 50, 3 and 10 ppm, respectively. 6 Based on the WHO (World Health Organization), air pollution is mainly due to toxic gases and caused around seven million premature deaths in 2012. 7 There are many toxic gases in our surrounding atmosphere. For example, carbon monoxide (CO) poisoning results in over 5000 deaths in the USA. 8 In Denmark, from 1995 to 2015, several hundred people passed away due to CO poisoning. 9 Also, in Iran, as a typical developing country, 836 deaths occurred in 2016due to CO poisoning. 10 CO has not any color, odor and taste, 11 and it has 240 times greater affinity for hemoglobin in comparison with oxygen. It forms carboxyhemoglobin, which leads to a reduced oxygen delivery to tissues and can cause tissue hypoxia. 8,12 Also, CO easily binds to cytochrome oxidase and leads to...

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“…A recent review by Becker et al. summarized a variety of approaches to couple FID to LC [33]. It should be noted that most coupling methods yielded a reduced sensitivity compared to GC‐FID typically yielding nanogram‐level sensitivity.…”

Section: Detectors In Polymer Lc and Their Strengths And Weaknessesmentioning

confidence: 99%

Detection challenges in quantitative polymer analysis by liquid chromatography

Knol

Pirok

Peters

2020

J of Separation Science

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Accurate quantification of polymer distributions is one of the main challenges in polymer analysis by liquid chromatography. The response of contemporary detectors is typically influenced by compositional features such as molecular weight, chain composition, end groups, and branching. This renders the accurate quantification of complex polymers of which there are no standards available, extremely challenging. Moreover, any (programmed) change in mobile‐phase composition may further limit the applicability of detection techniques. Current methods often rely on refractive index detection, which is not accurate when dealing with complex samples as the refractive‐index increment is often unknown. We review current and emerging detection methods in liquid chromatography with the aim of identifying detectors, which can be applied to the quantitative analysis of complex polymers.

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An overview of approaches in liquid chromatography flame ionization detection

Cited by 9 publications

References 46 publications

Preparation of a Novel SERS Platform Based on Mantis Wing with High-Density and Multi-Level “Hot Spots”

Preparation of a Novel SERS Platform Based on Mantis Wing with High-Density and Multi-Level “Hot Spots”

Resistive gas sensors based on metal-oxide nanowires

Detection challenges in quantitative polymer analysis by liquid chromatography

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