Environmental Application of High Sensitive Gas Sensors with Tunable Diode Laser Absorption Spectroscopy

Cui, Xiaojuan; Dong, Fengzhong; Zhang, Zhirong; Xia, Hua; Pang, Tao; Sun, Pengshuai; Wu, Botao; Liu, Shuo; Han, Luo; Li, Zhe; Yu, Ruan

doi:10.5772/intechopen.72948

Cited by 4 publications

(6 citation statements)

References 81 publications

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“…For these reasons, they have been used more frequently in Δ 13 C research in recent years (Ubierna et al 2018b). The precision of TDLAS for CO 2 isotopologues is reported to be 0.2 ‰ compared with ≤ 0.1 ‰ for IRMS (Cui et al 2018). Therefore, TDLAS might be less potent to detect the small differences in ∆ 13 C of C 4 plants (Table 1).…”

Section: Methods To Assess Carbon Isotope Discrimination (δ 13 C)mentioning

confidence: 99%

The carbon isotopic signature of C4 crops and its applicability in breeding for climate resilience

et al. 2021

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Key message Carbon isotope discrimination is a promising trait for indirect screening for improved water use efficiency of C4 crops. Abstract In the context of a changing climate, drought is one of the major factors limiting plant growth and yield. Hence, breeding efforts are directed toward improving water use efficiency (WUE) as a key factor in climate resilience and sustainability of crop production. As WUE is a complex trait and its evaluation is rather resource consuming, proxy traits, which are easier to screen and reliably reflect variation in WUE, are needed. In C3 crops, a trait established to be indicative for WUE is the carbon isotopic composition (δ13C) of plant material, which reflects the preferential assimilation of the lighter carbon isotope 12C over 13C during photosynthesis. In C4 crops, carbon fixation is more complex and δ13C thus depends on many more factors than in C3 crops. Recent physiological and genetic studies indicate a correlation between δ13C and WUE also in C4 crops, as well as a colocalization of quantitative trait loci for the two traits. Moreover, significant intraspecific variation as well as a medium to high heritability of δ13C has been shown in some of the main C4 crops, such as maize, sorghum and sugarcane, indicating its potential for indirect selection and breeding. Further research on physiological, genetic and environmental components influencing δ13C is needed to support its application in improving WUE and making C4 crops resilient to climate change.

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Section: Methods To Assess Carbon Isotope Discrimination (δ 13 C)mentioning

confidence: 99%

The carbon isotopic signature of C4 crops and its applicability in breeding for climate resilience

et al. 2021

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“…TDLAS is a promising technique for detecting specific gases because the laser's wavelength of operation can be adjusted in a controlled manner depending on the application [134]. They are highly sensitive with a rapid response time.…”

Section: Optical Gas Sensingmentioning

confidence: 99%

Greenhouse Gas Emissions and Life Cycle Assessment on the Black Soldier Fly (Hermetia illucens L.)

2022

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The black soldier fly (BSF) is recognised as a valuable insect for mitigating feed and organic waste management challenges. Thus, concerted efforts are being directed toward the promotion of the BSF. Despite the numerous advantages of BSF larvae, there are several critical environmental aspects, particularly its global warming potential, that need to be considered before large-scale adoption due to the complexity of the insect’s value chain. The direct assessment of greenhouse gas (GHG) and ammonia emissions from BSF larvae biotreatment is crucial for conducting a life cycle assessment (LCA) to evaluate the insect products’ environmental performance. This article reviews the emissions of GHG from BSF larvae bioconversion activities based on different gas sensing techniques while highlighting the factors that influence these emissions. Generally, low gas emissions were reported. However, the influence of various factors influencing emissions remains unclear, especially for nitrous oxide. We also analysed LCA studies on BSFL products while emphasising the uncertainties and variabilities among the studies. The wide variation of impact scores reported in the studies suggests that standardised guidelines should be developed to streamline methodical approaches for impact assessments pertaining to system boundaries, functional units, allocation, and system expansion assumptions. We identified several aspects for future improvements to harmonise studies in order to enhance the comparative assessment of the BSFL products.

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“…It can reach ppm level or even lower detection limit with long optical path length, due to the advantages of high sensitivity, good selectivity and fast response. There have been many comprehensive reviews about TDLAS and its applications [30,87]. Here in this section, we focus on the standoff TDLAS detection and try to bring this research direction up to date with recent developments.…”

Section: Tunable Diode Laser Absorption Spectroscopy (Tdlas)mentioning

confidence: 99%

“…A broadly-tunable ECQCL operating at 20 Hz spectral sweep rate and spectral resolution of 4 cm −1 was used for standoff gas-phase chemical detection over 300-600 m distances using a corner-cube retroreflector, from which noise equivalent concentration length (NECL) values as low as 0.75 ppm•m in 2-5 s averaging times were estimated for strongly absorbing chemicals [90]. The main application scenarios include measurement of greenhouse gas emissions [91], hazardous gas detection in underground coal mines [92], atmospheric composition monitoring [93][94][95], leak detection in petroleum storage tanks [87], standoff detection of alcohol vapors exhaled by humans [96], etc. Most recently, it has been utilized for food volatiles detection and handheld TDLAS sensor to detect meat spoilage [97].…”

Section: Tdlas With Retroreflectorsmentioning

confidence: 99%

Standoff Chemical Detection Using Laser Absorption Spectroscopy: A Review

et al. 2020

Remote Sensing

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Remote chemical detection in the atmosphere or some specific space has always been of great interest in many applications for environmental protection and safety. Laser absorption spectroscopy (LAS) is a highly desirable technology, benefiting from high measurement sensitivity, improved spectral selectivity or resolution, fast response and capability of good spatial resolution, multi-species and standoff detection with a non-cooperative target. Numerous LAS-based standoff detection techniques have seen rapid development recently and are reviewed herein, including differential absorption LiDAR, tunable laser absorption spectroscopy, laser photoacoustic spectroscopy, dual comb spectroscopy, laser heterodyne radiometry and active coherent laser absorption spectroscopy. An update of the current status of these various methods is presented, covering their principles, system compositions, features, developments and applications for standoff chemical detection over the last decade. In addition, a performance comparison together with the challenges and opportunities analysis is presented that describes the broad LAS-based techniques within the framework of remote sensing research and their directions of development for meeting potential practical use.

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Environmental Application of High Sensitive Gas Sensors with Tunable Diode Laser Absorption Spectroscopy

Cited by 4 publications

References 81 publications

The carbon isotopic signature of C4 crops and its applicability in breeding for climate resilience

The carbon isotopic signature of C4 crops and its applicability in breeding for climate resilience

Greenhouse Gas Emissions and Life Cycle Assessment on the Black Soldier Fly (Hermetia illucens L.)

Standoff Chemical Detection Using Laser Absorption Spectroscopy: A Review

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